Add -finput-charset=UTF-8 and -fextended-identifiers to gcc (and clang). All C sources can now use UTF-8, as far as gcc/clang/msvc support it. Not used yet

153 files changed, 293 insertions, 286 deletions

diff --git a/.github/workflows/linux-build.yml b/.github/workflows/linux-build.yml
index e6095f9..e7a9849 100644
--- a/.github/workflows/linux-build.yml
+++ b/.github/workflows/linux-build.yml
@@ -7,10 +7,12 @@ jobs:
       matrix:
         cfgopt:
           - ""
+          - "CFLAGS=-DTCL_UTF_MAX=4"
+          - "CFLAGS=-DTCL_NO_DEPRECATED=1"
           - "--disable-shared"
           - "--enable-symbols"
           - "--enable-symbols=mem"
-          - "CFLAGS=-DTCL_UTF_MAX=4"
+          - "CC=g++"
     defaults:
       run:
         shell: bash
diff --git a/.github/workflows/win-build.yml b/.github/workflows/win-build.yml
index 0c0e597..36cdf69 100644
--- a/.github/workflows/win-build.yml
+++ b/.github/workflows/win-build.yml
@@ -11,6 +11,8 @@ jobs:
       matrix:
         cfgopt:
           - ""
+          - "OPTS=utfmax"
+          - "OPTS=nodep"
           - "OPTS=static,staticpkg,msvcrt"
           - "OPTS=symbols"
           - "OPTS=memdbg"
@@ -51,9 +53,12 @@ jobs:
       matrix:
         cfgopt:
           - ""
+          - "CFLAGS=-DTCL_UTF_MAX=4"
+          - "CFLAGS=-DTCL_NO_DEPRECATED=1"
           - "--disable-shared"
           - "--enable-symbols"
           - "--enable-symbols=mem"
+          - "CC=g++"
     # Using powershell means we need to explicitly stop on failure
     steps:
       - name: Checkout
diff --git a/generic/regc_color.c b/generic/regc_color.c
index 92e0aad..f7dd284 100644
--- a/generic/regc_color.c
+++ b/generic/regc_color.c
@@ -2,7 +2,7 @@
  * colorings of characters
  * This file is #included by regcomp.c.
  *
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer. All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regc_cvec.c b/generic/regc_cvec.c
index d450d3e..3b4f1e4 100644
--- a/generic/regc_cvec.c
+++ b/generic/regc_cvec.c
@@ -2,7 +2,7 @@
  * Utility functions for handling cvecs
  * This file is #included by regcomp.c.
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regc_lex.c b/generic/regc_lex.c
index a303ec6..2914cbb 100644
--- a/generic/regc_lex.c
+++ b/generic/regc_lex.c
@@ -2,7 +2,7 @@
  * lexical analyzer
  * This file is #included by regcomp.c.
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regc_locale.c b/generic/regc_locale.c
index c90dd64..2aea16d 100644
--- a/generic/regc_locale.c
+++ b/generic/regc_locale.c
@@ -4,7 +4,7 @@
  *	This file contains the Unicode locale specific regexp routines.
  *	This file is #included by regcomp.c.
  *
- * Copyright (c) 1998 by Scriptics Corporation.
+ * Copyright © 1998 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/regc_nfa.c b/generic/regc_nfa.c
index 7507137..f676a45 100644
--- a/generic/regc_nfa.c
+++ b/generic/regc_nfa.c
@@ -2,7 +2,7 @@
  * NFA utilities.
  * This file is #included by regcomp.c.
  *
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer. All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regcomp.c b/generic/regcomp.c
index 3be5172..471d13b 100644
--- a/generic/regcomp.c
+++ b/generic/regcomp.c
@@ -2,7 +2,7 @@
  * re_*comp and friends - compile REs
  * This file #includes several others (see the bottom).
  *
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer. All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/rege_dfa.c b/generic/rege_dfa.c
index e5f22c4..f38c8c9 100644
--- a/generic/rege_dfa.c
+++ b/generic/rege_dfa.c
@@ -2,7 +2,7 @@
  * DFA routines
  * This file is #included by regexec.c.
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regerror.c b/generic/regerror.c
index 500dfe2..6606d41 100644
--- a/generic/regerror.c
+++ b/generic/regerror.c
@@ -1,7 +1,7 @@
 /*
  * regerror - error-code expansion
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regexec.c b/generic/regexec.c
index e7260cd..c085ac6 100644
--- a/generic/regexec.c
+++ b/generic/regexec.c
@@ -1,7 +1,7 @@
 /*
  * re_*exec and friends - match REs
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regfree.c b/generic/regfree.c
index b0aaa70..71263ab 100644
--- a/generic/regfree.c
+++ b/generic/regfree.c
@@ -1,7 +1,7 @@
 /*
  * regfree - free an RE
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/regfronts.c b/generic/regfronts.c
index 088a640..3042558 100644
--- a/generic/regfronts.c
+++ b/generic/regfronts.c
@@ -4,7 +4,7 @@
  * Mostly for implementation of backward-compatibility kludges. Note that
  * these routines exist ONLY in char versions.
  *
- * Copyright (c) 1998, 1999 Henry Spencer.  All rights reserved.
+ * Copyright © 1998, 1999 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/tclAlloc.c b/generic/tclAlloc.c
index 4a84255..81cd646 100644
--- a/generic/tclAlloc.c
+++ b/generic/tclAlloc.c
@@ -6,9 +6,9 @@
  *	that don't exactly fit are passed up to the next larger size. Blocks
  *	over a certain size are directly allocated from the system.
  *
- * Copyright (c) 1983 Regents of the University of California.
- * Copyright (c) 1996-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1983 Regents of the University of California.
+ * Copyright © 1996-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * Portions contributed by Chris Kingsley, Jack Jansen and Ray Johnson.
  *
diff --git a/generic/tclAssembly.c b/generic/tclAssembly.c
index 605758b..a20cd1a 100644
--- a/generic/tclAssembly.c
+++ b/generic/tclAssembly.c
@@ -6,8 +6,8 @@
  * This file contains the procedures that convert Tcl Assembly Language (TAL)
  * to a sequence of bytecode instructions for the Tcl execution engine.
  *
- * Copyright (c) 2010 by Ozgur Dogan Ugurlu.
- * Copyright (c) 2010 by Kevin B. Kenny.
+ * Copyright © 2010 Ozgur Dogan Ugurlu.
+ * Copyright © 2010 Kevin B. Kenny.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclAsync.c b/generic/tclAsync.c
index c432e4f..3a09304 100644
--- a/generic/tclAsync.c
+++ b/generic/tclAsync.c
@@ -5,8 +5,8 @@
  *	in a safe way. The code here doesn't actually handle signals, though.
  *	This code is based on proposals made by Mark Diekhans and Don Libes.
  *
- * Copyright (c) 1993 The Regents of the University of California.
- * Copyright (c) 1994 Sun Microsystems, Inc.
+ * Copyright © 1993 The Regents of the University of California.
+ * Copyright © 1994 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index ea17ee8..2ed4270 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -5,13 +5,13 @@
  *	including interpreter creation and deletion, command creation and
  *	deletion, and command/script execution.
  *
- * Copyright (c) 1987-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- * Copyright (c) 2001, 2002 by Kevin B. Kenny.  All rights reserved.
- * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
- * Copyright (c) 2006-2008 by Joe Mistachkin.  All rights reserved.
- * Copyright (c) 2008 Miguel Sofer <msofer@users.sourceforge.net>
+ * Copyright © 1987-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
+ * Copyright © 2001, 2002 Kevin B. Kenny.  All rights reserved.
+ * Copyright © 2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 2006-2008 Joe Mistachkin.  All rights reserved.
+ * Copyright © 2008 Miguel Sofer <msofer@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclBinary.c b/generic/tclBinary.c
index 8a3541b..1b36244 100644
--- a/generic/tclBinary.c
+++ b/generic/tclBinary.c
@@ -4,8 +4,8 @@
  *	This file contains the implementation of the "binary" Tcl built-in
  *	command and the Tcl binary data object.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCkalloc.c b/generic/tclCkalloc.c
index f761521..6cf3c4c 100644
--- a/generic/tclCkalloc.c
+++ b/generic/tclCkalloc.c
@@ -5,9 +5,9 @@
  *    problems involving overwritten, double freeing memory and loss of
  *    memory.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclClock.c b/generic/tclClock.c
index e5608b9..eb52244 100644
--- a/generic/tclClock.c
+++ b/generic/tclClock.c
@@ -5,9 +5,9 @@
  *	the time and date facilities of TclX, by Mark Diekhans and Karl
  *	Lehenbauer.
  *
- * Copyright (c) 1991-1995 Karl Lehenbauer & Mark Diekhans.
- * Copyright (c) 1995 Sun Microsystems, Inc.
- * Copyright (c) 2004 by Kevin B. Kenny. All rights reserved.
+ * Copyright © 1991-1995 Karl Lehenbauer & Mark Diekhans.
+ * Copyright © 1995 Sun Microsystems, Inc.
+ * Copyright © 2004 Kevin B. Kenny. All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCmdAH.c b/generic/tclCmdAH.c
index 7973154..c09ad95 100644
--- a/generic/tclCmdAH.c
+++ b/generic/tclCmdAH.c
@@ -4,8 +4,8 @@
  *	This file contains the top-level command routines for most of the Tcl
  *	built-in commands whose names begin with the letters A to H.
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1987-1993 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCmdIL.c b/generic/tclCmdIL.c
index da8dc65..beb55c0 100644
--- a/generic/tclCmdIL.c
+++ b/generic/tclCmdIL.c
@@ -6,12 +6,12 @@
  *	contains only commands in the generic core (i.e., those that don't
  *	depend much upon UNIX facilities).
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1993-1997 Lucent Technologies.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
- * Copyright (c) 2005 Donal K. Fellows.
+ * Copyright © 1987-1993 The Regents of the University of California.
+ * Copyright © 1993-1997 Lucent Technologies.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
+ * Copyright © 2001 Kevin B. Kenny. All rights reserved.
+ * Copyright © 2005 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index f3111be..3906810 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -6,11 +6,11 @@
  *	contains only commands in the generic core (i.e. those that don't
  *	depend much upon UNIX facilities).
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-2000 Scriptics Corporation.
- * Copyright (c) 2002 ActiveState Corporation.
- * Copyright (c) 2003-2009 Donal K. Fellows.
+ * Copyright © 1987-1993 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Scriptics Corporation.
+ * Copyright © 2002 ActiveState Corporation.
+ * Copyright © 2003-2009 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c
index beee208..13589b2 100644
--- a/generic/tclCompCmds.c
+++ b/generic/tclCompCmds.c
@@ -4,10 +4,10 @@
  *	This file contains compilation procedures that compile various Tcl
  *	commands into a sequence of instructions ("bytecodes").
  *
- * Copyright (c) 1997-1998 Sun Microsystems, Inc.
- * Copyright (c) 2001 by Kevin B. Kenny.  All rights reserved.
- * Copyright (c) 2002 ActiveState Corporation.
- * Copyright (c) 2004-2013 by Donal K. Fellows.
+ * Copyright © 1997-1998 Sun Microsystems, Inc.
+ * Copyright © 2001 Kevin B. Kenny.  All rights reserved.
+ * Copyright © 2002 ActiveState Corporation.
+ * Copyright © 2004-2013 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCompCmdsGR.c b/generic/tclCompCmdsGR.c
index cebd8f5..da557a4 100644
--- a/generic/tclCompCmdsGR.c
+++ b/generic/tclCompCmdsGR.c
@@ -5,10 +5,10 @@
  *	commands (beginning with the letters 'g' through 'r') into a sequence
  *	of instructions ("bytecodes").
  *
- * Copyright (c) 1997-1998 Sun Microsystems, Inc.
- * Copyright (c) 2001 by Kevin B. Kenny.  All rights reserved.
- * Copyright (c) 2002 ActiveState Corporation.
- * Copyright (c) 2004-2013 by Donal K. Fellows.
+ * Copyright © 1997-1998 Sun Microsystems, Inc.
+ * Copyright © 2001 Kevin B. Kenny.  All rights reserved.
+ * Copyright © 2002 ActiveState Corporation.
+ * Copyright © 2004-2013 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCompCmdsSZ.c b/generic/tclCompCmdsSZ.c
index 26698a8..0bac52b 100644
--- a/generic/tclCompCmdsSZ.c
+++ b/generic/tclCompCmdsSZ.c
@@ -6,10 +6,10 @@
  *	[upvar] and [variable]) into a sequence of instructions ("bytecodes").
  *	Also includes the operator command compilers.
  *
- * Copyright (c) 1997-1998 Sun Microsystems, Inc.
- * Copyright (c) 2001 by Kevin B. Kenny.  All rights reserved.
- * Copyright (c) 2002 ActiveState Corporation.
- * Copyright (c) 2004-2010 by Donal K. Fellows.
+ * Copyright © 1997-1998 Sun Microsystems, Inc.
+ * Copyright © 2001 Kevin B. Kenny.  All rights reserved.
+ * Copyright © 2002 ActiveState Corporation.
+ * Copyright © 2004-2010 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclCompile.c b/generic/tclCompile.c
index 2ab92da..6ffb3dd 100644
--- a/generic/tclCompile.c
+++ b/generic/tclCompile.c
@@ -5,8 +5,8 @@
  *	commands (like quoted strings or nested sub-commands) into a sequence
  *	of instructions ("bytecodes").
  *
- * Copyright (c) 1996-1998 Sun Microsystems, Inc.
- * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
+ * Copyright © 1996-1998 Sun Microsystems, Inc.
+ * Copyright © 2001 Kevin B. Kenny. All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclConfig.c b/generic/tclConfig.c
index 3bdcd38..540187f 100644
--- a/generic/tclConfig.c
+++ b/generic/tclConfig.c
@@ -4,7 +4,7 @@
  *	This file provides the facilities which allow Tcl and other packages
  *	to embed configuration information into their binary libraries.
  *
- * Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
+ * Copyright © 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclDictObj.c b/generic/tclDictObj.c
index 9c11df6..a0ce8a4 100644
--- a/generic/tclDictObj.c
+++ b/generic/tclDictObj.c
@@ -4,7 +4,7 @@
  *	This file contains functions that implement the Tcl dict object type
  *	and its accessor command.
  *
- * Copyright (c) 2002-2010 by Donal K. Fellows.
+ * Copyright © 2002-2010 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclDisassemble.c b/generic/tclDisassemble.c
index 8ccc303..f5cc8b7 100644
--- a/generic/tclDisassemble.c
+++ b/generic/tclDisassemble.c
@@ -4,9 +4,9 @@
  *	This file contains procedures that disassemble bytecode into either
  *	human-readable or Tcl-processable forms.
  *
- * Copyright (c) 1996-1998 Sun Microsystems, Inc.
- * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
- * Copyright (c) 2013-2016 Donal K. Fellows.
+ * Copyright © 1996-1998 Sun Microsystems, Inc.
+ * Copyright © 2001 Kevin B. Kenny. All rights reserved.
+ * Copyright © 2013-2016 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclEncoding.c b/generic/tclEncoding.c
index ff3c44c..c4ef159 100644
--- a/generic/tclEncoding.c
+++ b/generic/tclEncoding.c
@@ -3,7 +3,7 @@
  *
  *	Contains the implementation of the encoding conversion package.
  *
- * Copyright (c) 1996-1998 Sun Microsystems, Inc.
+ * Copyright © 1996-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclEnsemble.c b/generic/tclEnsemble.c
index 23516f8..929f3ef 100644
--- a/generic/tclEnsemble.c
+++ b/generic/tclEnsemble.c
@@ -4,7 +4,7 @@
  *	Contains support for ensembles (see TIP#112), which provide simple
  *	mechanism for creating composite commands on top of namespaces.
  *
- * Copyright (c) 2005-2013 Donal K. Fellows.
+ * Copyright © 2005-2013 Donal K. Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclEnv.c b/generic/tclEnv.c
index 96d050d..ad55645 100644
--- a/generic/tclEnv.c
+++ b/generic/tclEnv.c
@@ -6,8 +6,8 @@
  *	is primarily responsible for keeping the "env" arrays in sync with the
  *	system environment variables.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1998 Sun Microsystems, Inc.
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclEvent.c b/generic/tclEvent.c
index 76a45ae..bf3be38 100644
--- a/generic/tclEvent.c
+++ b/generic/tclEvent.c
@@ -5,9 +5,9 @@
  *	background errors, exit handlers, and the "vwait" and "update" command
  *	functions.
  *
- * Copyright (c) 1990-1994 The Regents of the University of California.
- * Copyright (c) 1994-1998 Sun Microsystems, Inc.
- * Copyright (c) 2004 by Zoran Vasiljevic.
+ * Copyright © 1990-1994 The Regents of the University of California.
+ * Copyright © 1994-1998 Sun Microsystems, Inc.
+ * Copyright © 2004 Zoran Vasiljevic.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index 63dd8e6..d5f843b 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -3,13 +3,13 @@
  *
  *	This file contains procedures that execute byte-compiled Tcl commands.
  *
- * Copyright (c) 1996-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-2000 by Scriptics Corporation.
- * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
- * Copyright (c) 2002-2010 by Miguel Sofer.
- * Copyright (c) 2005-2007 by Donal K. Fellows.
- * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
- * Copyright (c) 2006-2008 by Joe Mistachkin.  All rights reserved.
+ * Copyright © 1996-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Scriptics Corporation.
+ * Copyright © 2001 Kevin B. Kenny. All rights reserved.
+ * Copyright © 2002-2010 Miguel Sofer.
+ * Copyright © 2005-2007 Donal K. Fellows.
+ * Copyright © 2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 2006-2008 Joe Mistachkin.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclFCmd.c b/generic/tclFCmd.c
index f9636d8..5e39fc2 100644
--- a/generic/tclFCmd.c
+++ b/generic/tclFCmd.c
@@ -4,7 +4,7 @@
  *	This file implements the generic portion of file manipulation
  *	subcommands of the "file" command.
  *
- * Copyright (c) 1996-1998 Sun Microsystems, Inc.
+ * Copyright © 1996-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclFileName.c b/generic/tclFileName.c
index c3f3bf0..8cbd298 100644
--- a/generic/tclFileName.c
+++ b/generic/tclFileName.c
@@ -4,8 +4,8 @@
  *	This file contains routines for converting file names betwen native
  *	and network form.
  *
- * Copyright (c) 1995-1998 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1995-1998 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclGet.c b/generic/tclGet.c
index 12e0e79..3dbc545 100644
--- a/generic/tclGet.c
+++ b/generic/tclGet.c
@@ -5,8 +5,8 @@
  *	integers or floating-point numbers or booleans, doing syntax checking
  *	along the way.
  *
- * Copyright (c) 1990-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1990-1993 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclHash.c b/generic/tclHash.c
index 584b5e1..df1036b 100644
--- a/generic/tclHash.c
+++ b/generic/tclHash.c
@@ -4,8 +4,8 @@
  *	Implementation of in-memory hash tables for Tcl and Tcl-based
  *	applications.
  *
- * Copyright (c) 1991-1993 The Regents of the University of California.
- * Copyright (c) 1994 Sun Microsystems, Inc.
+ * Copyright © 1991-1993 The Regents of the University of California.
+ * Copyright © 1994 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclHistory.c b/generic/tclHistory.c
index 3a52a20..02e15a0 100644
--- a/generic/tclHistory.c
+++ b/generic/tclHistory.c
@@ -6,8 +6,8 @@
  *	commands ("events") before they are executed. Commands defined in
  *	history.tcl may be used to perform history substitutions.
  *
- * Copyright (c) 1990-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1990-1993 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIO.c b/generic/tclIO.c
index 1547489..2afd2cf 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -4,8 +4,8 @@
  *	This file provides the generic portions (those that are the same on
  *	all platforms and for all channel types) of Tcl's IO facilities.
  *
- * Copyright (c) 1998-2000 Ajuba Solutions
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Ajuba Solutions
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  * Contributions from Don Porter, NIST, 2014. (not subject to US copyright)
  *
  * See the file "license.terms" for information on usage and redistribution of
diff --git a/generic/tclIOCmd.c b/generic/tclIOCmd.c
index e28f9de..2ab31e4 100644
--- a/generic/tclIOCmd.c
+++ b/generic/tclIOCmd.c
@@ -3,7 +3,7 @@
  *
  *	Contains the definitions of most of the Tcl commands relating to IO.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIOGT.c b/generic/tclIOGT.c
index 353998f..95a8e0e 100644
--- a/generic/tclIOGT.c
+++ b/generic/tclIOGT.c
@@ -4,8 +4,8 @@
  *	Implements a generic transformation exposing the underlying API at the
  *	script level. Contributed by Andreas Kupries.
  *
- * Copyright (c) 2000 Ajuba Solutions
- * Copyright (c) 1999-2000 Andreas Kupries (a.kupries@westend.com)
+ * Copyright © 2000 Ajuba Solutions
+ * Copyright © 1999-2000 Andreas Kupries (a.kupries@westend.com)
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIORChan.c b/generic/tclIORChan.c
index e50c96f..888d946 100644
--- a/generic/tclIORChan.c
+++ b/generic/tclIORChan.c
@@ -10,7 +10,7 @@
  *
  *	See TIP #219 for the specification of this functionality.
  *
- * Copyright (c) 2004-2005 ActiveState, a divison of Sophos
+ * Copyright © 2004-2005 ActiveState, a divison of Sophos
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIORTrans.c b/generic/tclIORTrans.c
index 3c5f133..29c5158 100644
--- a/generic/tclIORTrans.c
+++ b/generic/tclIORTrans.c
@@ -10,7 +10,7 @@
  *
  *	See TIP #230 for the specification of this functionality.
  *
- * Copyright (c) 2007-2008 ActiveState.
+ * Copyright © 2007-2008 ActiveState.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIOSock.c b/generic/tclIOSock.c
index adf729a..87a79db 100644
--- a/generic/tclIOSock.c
+++ b/generic/tclIOSock.c
@@ -3,7 +3,7 @@
  *
  *	Common routines used by all socket based channel types.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIOUtil.c b/generic/tclIOUtil.c
index 322941a..191837e 100644
--- a/generic/tclIOUtil.c
+++ b/generic/tclIOUtil.c
@@ -7,9 +7,9 @@
  *	is the primary author.  Other signifiant contributors are Karl
  *	Lehenbauer, Mark Diekhans and Peter da Silva.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 2001-2004 Vincent Darley.
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 2001-2004 Vincent Darley.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclIndexObj.c b/generic/tclIndexObj.c
index 6ae2075..f08278b 100644
--- a/generic/tclIndexObj.c
+++ b/generic/tclIndexObj.c
@@ -5,9 +5,9 @@
  *	to lookup a keyword in a table of valid values and cache the index of
  *	the matching entry. Also provides table-based argv/argc processing.
  *
- * Copyright (c) 1990-1994 The Regents of the University of California.
- * Copyright (c) 1997 Sun Microsystems, Inc.
- * Copyright (c) 2006 Sam Bromley.
+ * Copyright © 1990-1994 The Regents of the University of California.
+ * Copyright © 1997 Sun Microsystems, Inc.
+ * Copyright © 2006 Sam Bromley.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclInterp.c b/generic/tclInterp.c
index f724175..a263a66 100644
--- a/generic/tclInterp.c
+++ b/generic/tclInterp.c
@@ -4,8 +4,8 @@
  *	This file implements the "interp" command which allows creation and
  *	manipulation of Tcl interpreters from within Tcl scripts.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 2004 Donal K. Fellows
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 2004 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclLink.c b/generic/tclLink.c
index 13bf6c4..02b19aa 100644
--- a/generic/tclLink.c
+++ b/generic/tclLink.c
@@ -6,10 +6,10 @@
  *	Andreas Stolcke and this implementation is based heavily on a
  *	prototype implementation provided by him.
  *
- * Copyright (c) 1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 2008 Rene Zaumseil
- * Copyright (c) 2019 Donal K. Fellows
+ * Copyright © 1993 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 2008 Rene Zaumseil
+ * Copyright © 2019 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclListObj.c b/generic/tclListObj.c
index 332e6aa..0cc1c11 100644
--- a/generic/tclListObj.c
+++ b/generic/tclListObj.c
@@ -3,9 +3,9 @@
  *
  *	This file contains functions that implement the Tcl list object type.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998 by Scriptics Corporation.
- * Copyright (c) 2001 by Kevin B. Kenny.  All rights reserved.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1998 Scriptics Corporation.
+ * Copyright © 2001 Kevin B. Kenny.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclLiteral.c b/generic/tclLiteral.c
index 22eff3c..fe1b00d 100644
--- a/generic/tclLiteral.c
+++ b/generic/tclLiteral.c
@@ -7,8 +7,8 @@
  *	general hashtable implementation of Tcl hash tables that appears in
  *	tclHash.c.
  *
- * Copyright (c) 1997-1998 Sun Microsystems, Inc.
- * Copyright (c) 2004 by Kevin B. Kenny.  All rights reserved.
+ * Copyright © 1997-1998 Sun Microsystems, Inc.
+ * Copyright © 2004 Kevin B. Kenny.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclLoad.c b/generic/tclLoad.c
index 13fea29..8b8aa2b 100644
--- a/generic/tclLoad.c
+++ b/generic/tclLoad.c
@@ -4,7 +4,7 @@
  *	This file provides the generic portion (those that are the same on all
  *	platforms) of Tcl's dynamic loading facilities.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclLoadNone.c b/generic/tclLoadNone.c
index e9f79e2..f60f843 100644
--- a/generic/tclLoadNone.c
+++ b/generic/tclLoadNone.c
@@ -4,7 +4,7 @@
  *	This procedure provides a version of the TclpDlopen for use in
  *	systems that don't support dynamic loading; it just returns an error.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclMain.c b/generic/tclMain.c
index cc9a829..13231b5 100644
--- a/generic/tclMain.c
+++ b/generic/tclMain.c
@@ -8,9 +8,9 @@
  *	application. Or, it can be used as a template for creating new main
  *	programs for Tcl applications.
  *
- * Copyright (c) 1988-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 2000 Ajuba Solutions.
+ * Copyright © 1988-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 2000 Ajuba Solutions.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclNamesp.c b/generic/tclNamesp.c
index e493db1..f57b7e1 100644
--- a/generic/tclNamesp.c
+++ b/generic/tclNamesp.c
@@ -7,11 +7,11 @@
  *	children of the global namespace. These other namespaces contain
  *	special-purpose commands and variables for packages.
  *
- * Copyright (c) 1993-1997 Lucent Technologies.
- * Copyright (c) 1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- * Copyright (c) 2002-2005 Donal K. Fellows.
- * Copyright (c) 2006 Neil Madden.
+ * Copyright © 1993-1997 Lucent Technologies.
+ * Copyright © 1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
+ * Copyright © 2002-2005 Donal K. Fellows.
+ * Copyright © 2006 Neil Madden.
  * Contributions from Don Porter, NIST, 2007. (not subject to US copyright)
  *
  * Originally implemented by
diff --git a/generic/tclNotify.c b/generic/tclNotify.c
index 65b4197..b43413d 100644
--- a/generic/tclNotify.c
+++ b/generic/tclNotify.c
@@ -7,9 +7,9 @@
  *	of the notifier is defined in the tcl*Notify.c files in each platform
  *	directory.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998 by Scriptics Corporation.
- * Copyright (c) 2003 by Kevin B. Kenny.  All rights reserved.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1998 Scriptics Corporation.
+ * Copyright © 2003 Kevin B. Kenny.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOO.c b/generic/tclOO.c
index e958279..405d5d0 100644
--- a/generic/tclOO.c
+++ b/generic/tclOO.c
@@ -3,8 +3,8 @@
  *
  *	This file contains the object-system core (NB: not Tcl_Obj, but ::oo)
  *
- * Copyright (c) 2005-2012 by Donal K. Fellows
- * Copyright (c) 2017 by Nathan Coulter
+ * Copyright © 2005-2012 Donal K. Fellows
+ * Copyright © 2017 Nathan Coulter
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOOBasic.c b/generic/tclOOBasic.c
index 19f68fc..6ea4681 100644
--- a/generic/tclOOBasic.c
+++ b/generic/tclOOBasic.c
@@ -4,7 +4,7 @@
  *	This file contains implementations of the "simple" commands and
  *	methods from the object-system core.
  *
- * Copyright (c) 2005-2013 by Donal K. Fellows
+ * Copyright © 2005-2013 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOOCall.c b/generic/tclOOCall.c
index 9191989..b7df93e 100644
--- a/generic/tclOOCall.c
+++ b/generic/tclOOCall.c
@@ -4,7 +4,7 @@
  *	This file contains the method call chain management code for the
  *	object-system core.
  *
- * Copyright (c) 2005-2012 by Donal K. Fellows
+ * Copyright © 2005-2012 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOODefineCmds.c b/generic/tclOODefineCmds.c
index e1d88ec..8cf3eb3 100644
--- a/generic/tclOODefineCmds.c
+++ b/generic/tclOODefineCmds.c
@@ -4,7 +4,7 @@
  *	This file contains the implementation of the ::oo::define command,
  *	part of the object-system core (NB: not Tcl_Obj, but ::oo).
  *
- * Copyright (c) 2006-2013 by Donal K. Fellows
+ * Copyright © 2006-2013 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOOInfo.c b/generic/tclOOInfo.c
index c9e136c..4e5b55b 100644
--- a/generic/tclOOInfo.c
+++ b/generic/tclOOInfo.c
@@ -4,7 +4,7 @@
  *	This file contains the implementation of the ::oo-related [info]
  *	subcommands.
  *
- * Copyright (c) 2006-2011 by Donal K. Fellows
+ * Copyright © 2006-2011 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOOMethod.c b/generic/tclOOMethod.c
index f65462e..f111461 100644
--- a/generic/tclOOMethod.c
+++ b/generic/tclOOMethod.c
@@ -3,7 +3,7 @@
  *
  *	This file contains code to create and manage methods.
  *
- * Copyright (c) 2005-2011 by Donal K. Fellows
+ * Copyright © 2005-2011 Donal K. Fellows
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclObj.c b/generic/tclObj.c
index 6e17141..e8134df 100644
--- a/generic/tclObj.c
+++ b/generic/tclObj.c
@@ -4,11 +4,11 @@
  *	This file contains Tcl object-related functions that are used by many
  *	Tcl commands.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 1999 by Scriptics Corporation.
- * Copyright (c) 2001 by ActiveState Corporation.
- * Copyright (c) 2005 by Kevin B. Kenny.  All rights reserved.
- * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1999 Scriptics Corporation.
+ * Copyright © 2001 ActiveState Corporation.
+ * Copyright © 2005 Kevin B. Kenny.  All rights reserved.
+ * Copyright © 2007 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclOptimize.c b/generic/tclOptimize.c
index 4383c62..de28b0c 100644
--- a/generic/tclOptimize.c
+++ b/generic/tclOptimize.c
@@ -3,7 +3,7 @@
  *
  *	This file contains the bytecode optimizer.
  *
- * Copyright (c) 2013 by Donal Fellows.
+ * Copyright © 2013 Donal Fellows.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclPanic.c b/generic/tclPanic.c
index da5c134..394661f 100644
--- a/generic/tclPanic.c
+++ b/generic/tclPanic.c
@@ -5,9 +5,9 @@
  *	applications will probably call Tcl_SetPanicProc() to set an
  *	application-specific panic procedure.
  *
- * Copyright (c) 1988-1993 The Regents of the University of California.
- * Copyright (c) 1994 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1988-1993 The Regents of the University of California.
+ * Copyright © 1994 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclParse.c b/generic/tclParse.c
index b863ff2..df6c9bf 100644
--- a/generic/tclParse.c
+++ b/generic/tclParse.c
@@ -5,8 +5,8 @@
  *	general-purpose fashion that can be used for many different purposes,
  *	including compilation, direct execution, code analysis, etc.
  *
- * Copyright (c) 1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-2000 Ajuba Solutions.
+ * Copyright © 1997 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Ajuba Solutions.
  * Contributions from Don Porter, NIST, 2002. (not subject to US copyright)
  *
  * See the file "license.terms" for information on usage and redistribution of
diff --git a/generic/tclPathObj.c b/generic/tclPathObj.c
index 8b1f199..e4826ad 100644
--- a/generic/tclPathObj.c
+++ b/generic/tclPathObj.c
@@ -5,7 +5,7 @@
  *	to represent and manipulate a general (virtual) filesystem entity in
  *	an efficient manner.
  *
- * Copyright (c) 2003 Vince Darley.
+ * Copyright © 2003 Vince Darley.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclPipe.c b/generic/tclPipe.c
index e9ad4e6..699d559 100644
--- a/generic/tclPipe.c
+++ b/generic/tclPipe.c
@@ -4,7 +4,7 @@
  *	This file contains the generic portion of the command channel driver
  *	as well as various utility routines used in managing subprocesses.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
+ * Copyright © 1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclPkg.c b/generic/tclPkg.c
index 89fb0c4..c3f2f17 100644
--- a/generic/tclPkg.c
+++ b/generic/tclPkg.c
@@ -4,8 +4,8 @@
  *	This file implements package and version control for Tcl via the
  *	"package" command and a few C APIs.
  *
- * Copyright (c) 1996 Sun Microsystems, Inc.
- * Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>
+ * Copyright © 1996 Sun Microsystems, Inc.
+ * Copyright © 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclPkgConfig.c b/generic/tclPkgConfig.c
index 12df68e..c8f0357 100644
--- a/generic/tclPkgConfig.c
+++ b/generic/tclPkgConfig.c
@@ -4,7 +4,7 @@
  *	This file contains the configuration information to embed into the tcl
  *	binary library.
  *
- * Copyright (c) 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
+ * Copyright © 2002 Andreas Kupries <andreas_kupries@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclPosixStr.c b/generic/tclPosixStr.c
index 411eb27..d91a9c4 100644
--- a/generic/tclPosixStr.c
+++ b/generic/tclPosixStr.c
@@ -4,8 +4,8 @@
  *	This file contains procedures that generate strings corresponding to
  *	various POSIX-related codes, such as errno and signals.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1996 Sun Microsystems, Inc.
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1996 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclPreserve.c b/generic/tclPreserve.c
index d60ebec..b32dd63 100644
--- a/generic/tclPreserve.c
+++ b/generic/tclPreserve.c
@@ -5,8 +5,8 @@
  *	sure that widget records and other data structures aren't reallocated
  *	when there are nested functions that depend on their existence.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1998 Sun Microsystems, Inc.
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclProc.c b/generic/tclProc.c
index 20af5fe..b3de29a 100644
--- a/generic/tclProc.c
+++ b/generic/tclProc.c
@@ -4,10 +4,10 @@
  *	This file contains routines that implement Tcl procedures, including
  *	the "proc" and "uplevel" commands.
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1994-1998 Sun Microsystems, Inc.
- * Copyright (c) 2004-2006 Miguel Sofer
- * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 1987-1993 The Regents of the University of California.
+ * Copyright © 1994-1998 Sun Microsystems, Inc.
+ * Copyright © 2004-2006 Miguel Sofer
+ * Copyright © 2007 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclProcess.c b/generic/tclProcess.c
index 7bd5e1a..fcb7bfd 100644
--- a/generic/tclProcess.c
+++ b/generic/tclProcess.c
@@ -4,7 +4,7 @@
  *	This file implements the "tcl::process" ensemble for subprocess
  *	management as defined by TIP #462.
  *
- * Copyright (c) 2017 Frederic Bonnet.
+ * Copyright © 2017 Frederic Bonnet.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclRegexp.c b/generic/tclRegexp.c
index 99135d3..f161782 100644
--- a/generic/tclRegexp.c
+++ b/generic/tclRegexp.c
@@ -4,8 +4,8 @@
  *	This file contains the public interfaces to the Tcl regular expression
  *	mechanism.
  *
- * Copyright (c) 1998 by Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1998 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -26,7 +26,7 @@
  *	regex.h		regexec.c	regfree.c
  *	regfronts.c	regguts.h
  *
- * Copyright (c) 1998 Henry Spencer.  All rights reserved.
+ * Copyright © 1998 Henry Spencer.  All rights reserved.
  *
  * Development of this software was funded, in part, by Cray Research Inc.,
  * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
diff --git a/generic/tclResolve.c b/generic/tclResolve.c
index ca53014..ff88ffd 100644
--- a/generic/tclResolve.c
+++ b/generic/tclResolve.c
@@ -6,7 +6,7 @@
  *	name resolution rules to the Tcl language. Rules can be applied to a
  *	particular namespace, to the interpreter as a whole, or both.
  *
- * Copyright (c) 1998 Lucent Technologies, Inc.
+ * Copyright © 1998 Lucent Technologies, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclResult.c b/generic/tclResult.c
index 1fb2ad0..ba42e46 100644
--- a/generic/tclResult.c
+++ b/generic/tclResult.c
@@ -3,7 +3,7 @@
  *
  *	This file contains code to manage the interpreter result.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
+ * Copyright © 1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclScan.c b/generic/tclScan.c
index 67fe6f3..f35b376 100644
--- a/generic/tclScan.c
+++ b/generic/tclScan.c
@@ -3,7 +3,7 @@
  *
  *	This file contains the implementation of the "scan" command.
  *
- * Copyright (c) 1998 by Scriptics Corporation.
+ * Copyright © 1998 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclStrToD.c b/generic/tclStrToD.c
index 35850d2..2f870c6 100644
--- a/generic/tclStrToD.c
+++ b/generic/tclStrToD.c
@@ -7,7 +7,7 @@
  *	into strings of digits, and procedures for interconversion among
  *	'double' and 'mp_int' types.
  *
- * Copyright (c) 2005 by Kevin B. Kenny. All rights reserved.
+ * Copyright © 2005 Kevin B. Kenny. All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 03aceaf..ecb8f53 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -27,8 +27,8 @@
  *	internal representation to keep track of how much space is used vs.
  *	allocated.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 1999 by Scriptics Corporation.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclStubInit.c b/generic/tclStubInit.c
index 0204bca..4b0e968 100644
--- a/generic/tclStubInit.c
+++ b/generic/tclStubInit.c
@@ -3,7 +3,7 @@
  *
  *	This file contains the initializers for the Tcl stub vectors.
  *
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclStubLib.c b/generic/tclStubLib.c
index 4f7240d..46d2f90 100644
--- a/generic/tclStubLib.c
+++ b/generic/tclStubLib.c
@@ -4,8 +4,8 @@
  *	Stub object that will be statically linked into extensions that want
  *	to access Tcl.
  *
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- * Copyright (c) 1998 Paul Duffin.
+ * Copyright © 1998-1999 Scriptics Corporation.
+ * Copyright © 1998 Paul Duffin.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTest.c b/generic/tclTest.c
index 03f8842..45b5ca3 100644
--- a/generic/tclTest.c
+++ b/generic/tclTest.c
@@ -6,10 +6,10 @@
  *	commands are not normally included in Tcl applications; they're only
  *	used for testing.
  *
- * Copyright (c) 1993-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-2000 Ajuba Solutions.
- * Copyright (c) 2003 by Kevin B. Kenny.  All rights reserved.
+ * Copyright © 1993-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Ajuba Solutions.
+ * Copyright © 2003 Kevin B. Kenny.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTestObj.c b/generic/tclTestObj.c
index bd5d92e..f7ad7b3 100644
--- a/generic/tclTestObj.c
+++ b/generic/tclTestObj.c
@@ -6,9 +6,9 @@
  *	These commands are not normally included in Tcl applications; they're
  *	only used for testing.
  *
- * Copyright (c) 1995-1998 Sun Microsystems, Inc.
- * Copyright (c) 1999 by Scriptics Corporation.
- * Copyright (c) 2005 by Kevin B. Kenny.  All rights reserved.
+ * Copyright © 1995-1998 Sun Microsystems, Inc.
+ * Copyright © 1999 Scriptics Corporation.
+ * Copyright © 2005 Kevin B. Kenny.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTestProcBodyObj.c b/generic/tclTestProcBodyObj.c
index 437644e..38cfaaa 100644
--- a/generic/tclTestProcBodyObj.c
+++ b/generic/tclTestProcBodyObj.c
@@ -5,7 +5,7 @@
  *	creation of Tcl procedures whose body argument is a Tcl_Obj of type
  *	"procbody" rather than a string.
  *
- * Copyright (c) 1998 by Scriptics Corporation.
+ * Copyright © 1998 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclThread.c b/generic/tclThread.c
index 76aaf4b..0e6e874 100644
--- a/generic/tclThread.c
+++ b/generic/tclThread.c
@@ -4,8 +4,8 @@
  *	This file implements Platform independent thread operations. Most of
  *	the real work is done in the platform dependent files.
  *
- * Copyright (c) 1998 by Sun Microsystems, Inc.
- * Copyright (c) 2008 by George Peter Staplin
+ * Copyright © 1998 Sun Microsystems, Inc.
+ * Copyright © 2008 George Peter Staplin
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclThreadAlloc.c b/generic/tclThreadAlloc.c
index eb8a35d..ad508b9 100644
--- a/generic/tclThreadAlloc.c
+++ b/generic/tclThreadAlloc.c
@@ -6,7 +6,7 @@
  *	fixed size blocks from block caches.
  *
  * The Initial Developer of the Original Code is America Online, Inc.
- * Portions created by AOL are Copyright (C) 1999 America Online, Inc.
+ * Portions created by AOL are Copyright © 1999 America Online, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclThreadJoin.c b/generic/tclThreadJoin.c
index 0aff0a7..ba789d3 100644
--- a/generic/tclThreadJoin.c
+++ b/generic/tclThreadJoin.c
@@ -6,7 +6,7 @@
  *	provide the functionality of joining threads.  This code is currently
  *	not necessary on Unix.
  *
- * Copyright (c) 2000 by Scriptics Corporation
+ * Copyright © 2000 Scriptics Corporation
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclThreadStorage.c b/generic/tclThreadStorage.c
index 74c23af..b2de9b4 100644
--- a/generic/tclThreadStorage.c
+++ b/generic/tclThreadStorage.c
@@ -4,8 +4,8 @@
  *	This file implements platform independent thread storage operations to
  *	work around system limits on the number of thread-specific variables.
  *
- * Copyright (c) 2003-2004 by Joe Mistachkin
- * Copyright (c) 2008 by George Peter Staplin
+ * Copyright © 2003-2004 Joe Mistachkin
+ * Copyright © 2008 George Peter Staplin
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclThreadTest.c b/generic/tclThreadTest.c
index 0bb55e1..c484fb6 100644
--- a/generic/tclThreadTest.c
+++ b/generic/tclThreadTest.c
@@ -6,8 +6,8 @@
  *	Some of this code is based on work done by Richard Hipp on behalf of
  *	Conservation Through Innovation, Limited, with their permission.
  *
- * Copyright (c) 1998 by Sun Microsystems, Inc.
- * Copyright (c) 2006-2008 by Joe Mistachkin.  All rights reserved.
+ * Copyright © 1998 Sun Microsystems, Inc.
+ * Copyright © 2006-2008 Joe Mistachkin.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTimer.c b/generic/tclTimer.c
index 6b94cbb..bd9e321 100644
--- a/generic/tclTimer.c
+++ b/generic/tclTimer.c
@@ -4,7 +4,7 @@
  *	This file provides timer event management facilities for Tcl,
  *	including the "after" command.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
+ * Copyright © 1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTomMathInterface.c b/generic/tclTomMathInterface.c
index 60ed123..149ee34 100644
--- a/generic/tclTomMathInterface.c
+++ b/generic/tclTomMathInterface.c
@@ -6,7 +6,7 @@
  *	This file contains procedures that are used as a 'glue' layer between
  *	Tcl and libtommath.
  *
- * Copyright (c) 2005 by Kevin B. Kenny.  All rights reserved.
+ * Copyright © 2005 Kevin B. Kenny.  All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTomMathStubLib.c b/generic/tclTomMathStubLib.c
index 7bebe12..c0786c9 100644
--- a/generic/tclTomMathStubLib.c
+++ b/generic/tclTomMathStubLib.c
@@ -4,8 +4,8 @@
  *	Stub object that will be statically linked into extensions that want
  *	to access Tcl.
  *
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- * Copyright (c) 1998 Paul Duffin.
+ * Copyright © 1998-1999 Scriptics Corporation.
+ * Copyright © 1998 Paul Duffin.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclTrace.c b/generic/tclTrace.c
index d189581..acb0fa4 100644
--- a/generic/tclTrace.c
+++ b/generic/tclTrace.c
@@ -3,10 +3,10 @@
  *
  *	This file contains code to handle most trace management.
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-2000 Scriptics Corporation.
- * Copyright (c) 2002 ActiveState Corporation.
+ * Copyright © 1987-1993 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Scriptics Corporation.
+ * Copyright © 2002 ActiveState Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclUniData.c b/generic/tclUniData.c
index ad47dda..f6e0c6b 100644
--- a/generic/tclUniData.c
+++ b/generic/tclUniData.c
@@ -5,7 +5,7 @@
  *	automatically generated by the tools/uniParse.tcl script.  Do not
  *	modify this file by hand.
  *
- * Copyright (c) 1998 by Scriptics Corporation.
+ * Copyright © 1998 Scriptics Corporation.
  * All rights reserved.
  */
 
diff --git a/generic/tclUtf.c b/generic/tclUtf.c
index 525cd50..5db7343 100644
--- a/generic/tclUtf.c
+++ b/generic/tclUtf.c
@@ -3,7 +3,7 @@
  *
  *	Routines for manipulating UTF-8 strings.
  *
- * Copyright (c) 1997-1998 Sun Microsystems, Inc.
+ * Copyright © 1997-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclUtil.c b/generic/tclUtil.c
index 170a85e..1288738 100644
--- a/generic/tclUtil.c
+++ b/generic/tclUtil.c
@@ -4,9 +4,9 @@
  *	This file contains utility functions that are used by many Tcl
  *	commands.
  *
- * Copyright (c) 1987-1993 The Regents of the University of California.
- * Copyright (c) 1994-1998 Sun Microsystems, Inc.
- * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
+ * Copyright © 1987-1993 The Regents of the University of California.
+ * Copyright © 1994-1998 Sun Microsystems, Inc.
+ * Copyright © 2001 Kevin B. Kenny. All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclVar.c b/generic/tclVar.c
index 0f0bc25..51c51f8 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -7,11 +7,11 @@
  *	The implementation of arrays is modelled after an initial
  *	implementation by Mark Diekhans and Karl Lehenbauer.
  *
- * Copyright (c) 1987-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
- * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
- * Copyright (c) 2007 Miguel Sofer
+ * Copyright © 1987-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
+ * Copyright © 2001 Kevin B. Kenny. All rights reserved.
+ * Copyright © 2007 Miguel Sofer
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclZipfs.c b/generic/tclZipfs.c
index ceb0833..e84b490 100644
--- a/generic/tclZipfs.c
+++ b/generic/tclZipfs.c
@@ -4,8 +4,8 @@
  *	Implementation of the ZIP filesystem used in TIP 430
  *	Adapted from the implentation for AndroWish.
  *
- * Copyright (c) 2016-2017 Sean Woods <yoda@etoyoc.com>
- * Copyright (c) 2013-2015 Christian Werner <chw@ch-werner.de>
+ * Copyright © 2016-2017 Sean Woods <yoda@etoyoc.com>
+ * Copyright © 2013-2015 Christian Werner <chw@ch-werner.de>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/generic/tclZlib.c b/generic/tclZlib.c
index 05f13b5..fc3be60 100644
--- a/generic/tclZlib.c
+++ b/generic/tclZlib.c
@@ -3,9 +3,9 @@
  *
  *	This file provides the interface to the Zlib library.
  *
- * Copyright (C) 2004-2005 Pascal Scheffers <pascal@scheffers.net>
- * Copyright (C) 2005 Unitas Software B.V.
- * Copyright (c) 2008-2012 Donal K. Fellows
+ * Copyright © 2004-2005 Pascal Scheffers <pascal@scheffers.net>
+ * Copyright © 2005 Unitas Software B.V.
+ * Copyright © 2008-2012 Donal K. Fellows
  *
  * Parts written by Jean-Claude Wippler, as part of Tclkit, placed in the
  * public domain March 2003.
diff --git a/macosx/tclMacOSXBundle.c b/macosx/tclMacOSXBundle.c
index af15287..6707ef0 100644
--- a/macosx/tclMacOSXBundle.c
+++ b/macosx/tclMacOSXBundle.c
@@ -4,8 +4,8 @@
  *	This file implements functions that inspect CFBundle structures on
  *	MacOS X.
  *
- * Copyright 2001-2009, Apple Inc.
- * Copyright (c) 2003-2009 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 2001-2009 Apple Inc.
+ * Copyright © 2003-2009 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/macosx/tclMacOSXFCmd.c b/macosx/tclMacOSXFCmd.c
index 52c43e7..a70a789 100644
--- a/macosx/tclMacOSXFCmd.c
+++ b/macosx/tclMacOSXFCmd.c
@@ -4,7 +4,7 @@
  *	This file implements the MacOSX specific portion of file manipulation
  *	subcommands of the "file" command.
  *
- * Copyright (c) 2003-2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 2003-2007 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/macosx/tclMacOSXNotify.c b/macosx/tclMacOSXNotify.c
index ee271e1..3bf5e08 100644
--- a/macosx/tclMacOSXNotify.c
+++ b/macosx/tclMacOSXNotify.c
@@ -5,9 +5,9 @@
  *	based notifier, which is the lowest-level part of the Tcl event loop.
  *	This file works together with generic/tclNotify.c.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright 2001-2009, Apple Inc.
- * Copyright (c) 2005-2009 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 2001-2009, Apple Inc.
+ * Copyright © 2005-2009 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/configure b/unix/configure
index 473ac13..e2f45b1 100755
--- a/unix/configure
+++ b/unix/configure
@@ -5027,12 +5027,12 @@ fi
     if test "$GCC" = yes; then :
 
 	CFLAGS_OPTIMIZE=-O2
-	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith"
+	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith -finput-charset=UTF-8"
 	case "${CC}" in
 	    *++|*++-*)
 		;;
 	    *)
-		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -Wdeclaration-after-statement"
+		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -fextended-identifiers -Wdeclaration-after-statement"
 		;;
 	esac
 
diff --git a/unix/dltest/pkga.c b/unix/dltest/pkga.c
index c2d814f..e00f996 100644
--- a/unix/dltest/pkga.c
+++ b/unix/dltest/pkga.c
@@ -4,7 +4,7 @@
  *	This file contains a simple Tcl package "pkga" that is intended for
  *	testing the Tcl dynamic loading facilities.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/dltest/pkgb.c b/unix/dltest/pkgb.c
index 741b2a1..3210669 100644
--- a/unix/dltest/pkgb.c
+++ b/unix/dltest/pkgb.c
@@ -5,7 +5,7 @@
  *	testing the Tcl dynamic loading facilities. It can be used in both
  *	safe and unsafe interpreters.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/dltest/pkgc.c b/unix/dltest/pkgc.c
index 46f6e86..2b46986 100644
--- a/unix/dltest/pkgc.c
+++ b/unix/dltest/pkgc.c
@@ -5,7 +5,7 @@
  *	testing the Tcl dynamic loading facilities. It can be used in both
  *	safe and unsafe interpreters.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/dltest/pkgd.c b/unix/dltest/pkgd.c
index d3af83f..5c799f5 100644
--- a/unix/dltest/pkgd.c
+++ b/unix/dltest/pkgd.c
@@ -5,7 +5,7 @@
  *	testing the Tcl dynamic loading facilities. It can be used in both
  *	safe and unsafe interpreters.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/dltest/pkge.c b/unix/dltest/pkge.c
index f46ca74..26a4b79 100644
--- a/unix/dltest/pkge.c
+++ b/unix/dltest/pkge.c
@@ -5,7 +5,7 @@
  *	testing the Tcl dynamic loading facilities. Its Init procedure returns
  *	an error in order to test how this is handled.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/dltest/pkgooa.c b/unix/dltest/pkgooa.c
index 7d0c98b..ff1cf1f 100644
--- a/unix/dltest/pkgooa.c
+++ b/unix/dltest/pkgooa.c
@@ -4,7 +4,7 @@
  *	This file contains a simple Tcl package "pkgooa" that is intended for
  *	testing the Tcl dynamic loading facilities.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/dltest/pkgua.c b/unix/dltest/pkgua.c
index c5102a8..0ab3e23 100644
--- a/unix/dltest/pkgua.c
+++ b/unix/dltest/pkgua.c
@@ -4,8 +4,8 @@
  *	This file contains a simple Tcl package "pkgua" that is intended for
  *	testing the Tcl dynamic unloading facilities.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
- * Copyright (c) 2004 Georgios Petasis
+ * Copyright © 1995 Sun Microsystems, Inc.
+ * Copyright © 2004 Georgios Petasis
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index c9d9e3a..01ccead 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -958,12 +958,12 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
     CFLAGS_DEBUG=-g
     AS_IF([test "$GCC" = yes], [
 	CFLAGS_OPTIMIZE=-O2
-	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith"
+	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith -finput-charset=UTF-8"
 	case "${CC}" in
 	    *++|*++-*)
 		;;
 	    *)
-		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -Wdeclaration-after-statement"
+		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -fextended-identifiers -Wdeclaration-after-statement"
 		;;
 	esac
 
diff --git a/unix/tclEpollNotfy.c b/unix/tclEpollNotfy.c
index 406b7ca..3a99e6d 100644
--- a/unix/tclEpollNotfy.c
+++ b/unix/tclEpollNotfy.c
@@ -5,8 +5,8 @@
  *	Linux-specific notifier, which is the lowest-level part of the Tcl
  *	event loop. This file works together with generic/tclNotify.c.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclKqueueNotfy.c b/unix/tclKqueueNotfy.c
index 4daab7c..2f1d8e6 100644
--- a/unix/tclKqueueNotfy.c
+++ b/unix/tclKqueueNotfy.c
@@ -6,8 +6,8 @@
  *	level part of the Tcl event loop. This file works together with
  *	generic/tclNotify.c.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclLoadAix.c b/unix/tclLoadAix.c
index fea9494..17fca04 100644
--- a/unix/tclLoadAix.c
+++ b/unix/tclLoadAix.c
@@ -9,7 +9,7 @@
  *	different from the notice used elsewhere in Tcl. The file has been
  *	modified to incorporate the file dlfcn.h in-line.
  *
- *	Copyright (c) 1992,1993,1995,1996, Jens-Uwe Mager, Helios Software GmbH
+ *	Copyright © 1992,1993,1995,1996, Jens-Uwe Mager, Helios Software GmbH
  *	Not derived from licensed software.
  *
  *	Permission is granted to freely use, copy, modify, and redistribute
@@ -23,7 +23,7 @@
 
 /*
  * @(#)dlfcn.c	1.7 revision of 95/08/14  19:08:38
- * This is an unpublished work copyright (c) 1992 HELIOS Software GmbH
+ * This is an unpublished work copyright © 1992 HELIOS Software GmbH
  * 30159 Hannover, Germany
  */
 
diff --git a/unix/tclLoadDl.c b/unix/tclLoadDl.c
index 2a09037..342dff6 100644
--- a/unix/tclLoadDl.c
+++ b/unix/tclLoadDl.c
@@ -4,7 +4,7 @@
  *	This procedure provides a version of the TclLoadFile that works with
  *	the "dlopen" and "dlsym" library procedures for dynamic loading.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclLoadDyld.c b/unix/tclLoadDyld.c
index de738e9..017793d 100644
--- a/unix/tclLoadDyld.c
+++ b/unix/tclLoadDyld.c
@@ -6,8 +6,8 @@
  *	Original version of his file (superseded long ago) provided by
  *	Wilfredo Sanchez (wsanchez@apple.com).
  *
- * Copyright (c) 1995 Apple Computer, Inc.
- * Copyright (c) 2001-2007 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright © 1995 Apple Computer, Inc.
+ * Copyright © 2001-2007 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclLoadNext.c b/unix/tclLoadNext.c
index 3f59998..ee39326 100644
--- a/unix/tclLoadNext.c
+++ b/unix/tclLoadNext.c
@@ -4,7 +4,7 @@
  *	This procedure provides a version of the TclLoadFile that works with
  *	NeXTs rld_* dynamic loading. This file provided by Pedja Bogdanovich.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclLoadOSF.c b/unix/tclLoadOSF.c
index b8423dd..7fd0cf3 100644
--- a/unix/tclLoadOSF.c
+++ b/unix/tclLoadOSF.c
@@ -26,7 +26,7 @@
  *
  *	John Robert LoVerso <loverso@freebsd.osf.org>
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclLoadShl.c b/unix/tclLoadShl.c
index 876896a..11eaa83 100644
--- a/unix/tclLoadShl.c
+++ b/unix/tclLoadShl.c
@@ -5,7 +5,7 @@
  *	the "shl_load" and "shl_findsym" library procedures for dynamic
  *	loading (e.g. for HP machines).
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclSelectNotfy.c b/unix/tclSelectNotfy.c
index 5f30857..1d16114 100644
--- a/unix/tclSelectNotfy.c
+++ b/unix/tclSelectNotfy.c
@@ -5,7 +5,7 @@
  *	Unix notifier, which is the lowest-level part of the Tcl event loop.
  *	This file works together with generic/tclNotify.c.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixChan.c b/unix/tclUnixChan.c
index 9273b8e..71ff61d 100644
--- a/unix/tclUnixChan.c
+++ b/unix/tclUnixChan.c
@@ -4,8 +4,8 @@
  *	Common channel driver for Unix channels based on files, command pipes
  *	and TCP sockets.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixEvent.c b/unix/tclUnixEvent.c
index 40aac6f..aff7797 100644
--- a/unix/tclUnixEvent.c
+++ b/unix/tclUnixEvent.c
@@ -3,7 +3,7 @@
  *
  *	This file implements Unix specific event related routines.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
+ * Copyright © 1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixFCmd.c b/unix/tclUnixFCmd.c
index eee47d7..4d08c1d 100644
--- a/unix/tclUnixFCmd.c
+++ b/unix/tclUnixFCmd.c
@@ -5,7 +5,7 @@
  *	subcommands of the "file" command. All filename arguments should
  *	already be translated to native format.
  *
- * Copyright (c) 1996-1998 Sun Microsystems, Inc.
+ * Copyright © 1996-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -13,7 +13,7 @@
  * Portions of this code were derived from NetBSD source code which has the
  * following copyright notice:
  *
- * Copyright (c) 1988, 1993, 1994
+ * Copyright © 1988, 1993, 1994
  *      The Regents of the University of California. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/unix/tclUnixFile.c b/unix/tclUnixFile.c
index fdf7904..203a118 100644
--- a/unix/tclUnixFile.c
+++ b/unix/tclUnixFile.c
@@ -4,7 +4,7 @@
  *	This file contains wrappers around UNIX file handling functions.
  *	These wrappers mask differences between Windows and UNIX.
  *
- * Copyright (c) 1995-1998 Sun Microsystems, Inc.
+ * Copyright © 1995-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixInit.c b/unix/tclUnixInit.c
index 12cbd2c..704224f 100644
--- a/unix/tclUnixInit.c
+++ b/unix/tclUnixInit.c
@@ -3,8 +3,8 @@
  *
  *	Contains the Unix-specific interpreter initialization functions.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 1999 by Scriptics Corporation.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1999 Scriptics Corporation.
  * All rights reserved.
  */
 
diff --git a/unix/tclUnixNotfy.c b/unix/tclUnixNotfy.c
index 6b1ec3d..d992d65 100644
--- a/unix/tclUnixNotfy.c
+++ b/unix/tclUnixNotfy.c
@@ -4,8 +4,8 @@
  *	This file contains subroutines shared by all notifier backend
  *	implementations on *nix platforms.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- * Copyright (c) 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 2016 Lucio Andrés Illanes Albornoz <l.illanes@gmx.de>
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixPipe.c b/unix/tclUnixPipe.c
index 5d02486..e7199bc 100644
--- a/unix/tclUnixPipe.c
+++ b/unix/tclUnixPipe.c
@@ -4,8 +4,8 @@
  *	This file implements the UNIX-specific exec pipeline functions, the
  *	"pipe" channel driver, and the "pid" Tcl command.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixSock.c b/unix/tclUnixSock.c
index 8c9386c..076678c 100644
--- a/unix/tclUnixSock.c
+++ b/unix/tclUnixSock.c
@@ -3,7 +3,7 @@
  *
  *	This file contains Unix-specific socket related code.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixTest.c b/unix/tclUnixTest.c
index b06abdf0..80e8081 100644
--- a/unix/tclUnixTest.c
+++ b/unix/tclUnixTest.c
@@ -3,8 +3,8 @@
  *
  *	Contains platform specific test commands for the Unix platform.
  *
- * Copyright (c) 1996-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998 by Scriptics Corporation.
+ * Copyright © 1996-1997 Sun Microsystems, Inc.
+ * Copyright © 1998 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c
index 92399f4..8a16d0b 100644
--- a/unix/tclUnixThrd.c
+++ b/unix/tclUnixThrd.c
@@ -3,9 +3,9 @@
  *
  *	This file implements the UNIX-specific thread support.
  *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 2008 by George Peter Staplin
+ * Copyright © 1991-1994 The Regents of the University of California.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 2008 George Peter Staplin
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c
index 07b3065..ead7b0c 100644
--- a/unix/tclUnixTime.c
+++ b/unix/tclUnixTime.c
@@ -4,7 +4,7 @@
  *	Contains Unix specific versions of Tcl functions that obtain time
  *	values from the operating system.
  *
- * Copyright (c) 1995 Sun Microsystems, Inc.
+ * Copyright © 1995 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclXtNotify.c b/unix/tclXtNotify.c
index cf99fb2..68ee578 100644
--- a/unix/tclXtNotify.c
+++ b/unix/tclXtNotify.c
@@ -4,7 +4,7 @@
  *	This file contains the notifier driver implementation for the Xt
  *	intrinsics.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
+ * Copyright © 1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/unix/tclXtTest.c b/unix/tclXtTest.c
index 6c09a50..afac493 100644
--- a/unix/tclXtTest.c
+++ b/unix/tclXtTest.c
@@ -3,7 +3,7 @@
  *
  *	Contains commands for Xt notifier specific tests on Unix.
  *
- * Copyright (c) 1997 by Sun Microsystems, Inc.
+ * Copyright © 1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/configure b/win/configure
index 89bec9f..8830ea8 100755
--- a/win/configure
+++ b/win/configure
@@ -4207,7 +4207,7 @@ $as_echo "using shared flags" >&6; }
 
 	CFLAGS_DEBUG=-g
 	CFLAGS_OPTIMIZE="-O2 -fomit-frame-pointer"
-	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith"
+	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith -finput-charset=UTF-8"
 	LDFLAGS_DEBUG=
 	LDFLAGS_OPTIMIZE=
 
@@ -4216,7 +4216,7 @@ $as_echo "using shared flags" >&6; }
 		CFLAGS_WARNING="${CFLAGS_WARNING} -Wno-format"
 		;;
 	    *)
-		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -Wdeclaration-after-statement"
+		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -fextended-identifiers -Wdeclaration-after-statement"
 		;;
 	esac
 
diff --git a/win/tcl.m4 b/win/tcl.m4
index fa21b2d..ec1442b 100644
--- a/win/tcl.m4
+++ b/win/tcl.m4
@@ -665,7 +665,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
 
 	CFLAGS_DEBUG=-g
 	CFLAGS_OPTIMIZE="-O2 -fomit-frame-pointer"
-	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith"
+	CFLAGS_WARNING="-Wall -Wextra -Wshadow -Wundef -Wwrite-strings -Wpointer-arith -finput-charset=UTF-8"
 	LDFLAGS_DEBUG=
 	LDFLAGS_OPTIMIZE=
 
@@ -674,7 +674,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
 		CFLAGS_WARNING="${CFLAGS_WARNING} -Wno-format"
 		;;
 	    *)
-		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -Wdeclaration-after-statement"
+		CFLAGS_WARNING="${CFLAGS_WARNING} -Wc++-compat -fextended-identifiers -Wdeclaration-after-statement"
 		;;
 	esac
 
diff --git a/win/tclWin32Dll.c b/win/tclWin32Dll.c
index f667b05..cb9f8c8 100644
--- a/win/tclWin32Dll.c
+++ b/win/tclWin32Dll.c
@@ -4,8 +4,8 @@
  *	This file contains the DLL entry point and other low-level bit bashing
  *	code that needs inline assembly.
  *
- * Copyright (c) 1995-1996 Sun Microsystems, Inc.
- * Copyright (c) 1998-2000 Scriptics Corporation.
+ * Copyright © 1995-1996 Sun Microsystems, Inc.
+ * Copyright © 1998-2000 Scriptics Corporation.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinChan.c b/win/tclWinChan.c
index 544c000..03671f9 100644
--- a/win/tclWinChan.c
+++ b/win/tclWinChan.c
@@ -4,7 +4,7 @@
  *	Channel drivers for Windows channels based on files, command pipes and
  *	TCP sockets.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinConsole.c b/win/tclWinConsole.c
index 3b8753b..0556646 100644
--- a/win/tclWinConsole.c
+++ b/win/tclWinConsole.c
@@ -4,7 +4,7 @@
  *	This file implements the Windows-specific console functions, and the
  *	"console" channel driver.
  *
- * Copyright (c) 1999 by Scriptics Corp.
+ * Copyright © 1999 Scriptics Corp.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinError.c b/win/tclWinError.c
index 7b885df..e85becc 100644
--- a/win/tclWinError.c
+++ b/win/tclWinError.c
@@ -4,7 +4,7 @@
  *	This file contains code for converting from Win32 errors to errno
  *	errors.
  *
- * Copyright (c) 1995-1996 by Sun Microsystems, Inc.
+ * Copyright © 1995-1996 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinFCmd.c b/win/tclWinFCmd.c
index ad4bae1..c88621c 100644
--- a/win/tclWinFCmd.c
+++ b/win/tclWinFCmd.c
@@ -4,7 +4,7 @@
  *	This file implements the Windows specific portion of file manipulation
  *	subcommands of the "file" command.
  *
- * Copyright (c) 1996-1998 Sun Microsystems, Inc.
+ * Copyright © 1996-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinFile.c b/win/tclWinFile.c
index 89f485a..b1727af 100644
--- a/win/tclWinFile.c
+++ b/win/tclWinFile.c
@@ -6,7 +6,7 @@
  *	files, which can be manipulated through the Win32 console redirection
  *	interfaces.
  *
- * Copyright (c) 1995-1998 Sun Microsystems, Inc.
+ * Copyright © 1995-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinInit.c b/win/tclWinInit.c
index 5c3901b..29393ce 100644
--- a/win/tclWinInit.c
+++ b/win/tclWinInit.c
@@ -3,8 +3,8 @@
  *
  *	Contains the Windows-specific interpreter initialization functions.
  *
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 1998-1999 by Scriptics Corporation.
+ * Copyright © 1994-1997 Sun Microsystems, Inc.
+ * Copyright © 1998-1999 Scriptics Corporation.
  * All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
diff --git a/win/tclWinLoad.c b/win/tclWinLoad.c
index caaca42..656148a 100644
--- a/win/tclWinLoad.c
+++ b/win/tclWinLoad.c
@@ -5,7 +5,7 @@
  *	the Windows "LoadLibrary" and "GetProcAddress" API for dynamic
  *	loading.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinNotify.c b/win/tclWinNotify.c
index 7d5249d..fff7910 100644
--- a/win/tclWinNotify.c
+++ b/win/tclWinNotify.c
@@ -5,7 +5,7 @@
  *	is the lowest-level part of the Tcl event loop. This file works
  *	together with ../generic/tclNotify.c.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinPanic.c b/win/tclWinPanic.c
index fbd3e46..364673e 100644
--- a/win/tclWinPanic.c
+++ b/win/tclWinPanic.c
@@ -3,7 +3,7 @@
  *
  *	Contains the Windows-specific command-line panic proc.
  *
- * Copyright (c) 2013 by Jan Nijtmans.
+ * Copyright © 2013 Jan Nijtmans.
  * All rights reserved.
  *
  * See the file "license.terms" for information on usage and redistribution of
diff --git a/win/tclWinPipe.c b/win/tclWinPipe.c
index a93688d..6a9d9a9 100644
--- a/win/tclWinPipe.c
+++ b/win/tclWinPipe.c
@@ -4,7 +4,7 @@
  *	This file implements the Windows-specific exec pipeline functions, the
  *	"pipe" channel driver, and the "pid" Tcl command.
  *
- * Copyright (c) 1996-1997 by Sun Microsystems, Inc.
+ * Copyright © 1996-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinSerial.c b/win/tclWinSerial.c
index f0035b9..32f4c31 100644
--- a/win/tclWinSerial.c
+++ b/win/tclWinSerial.c
@@ -4,7 +4,7 @@
  *	This file implements the Windows-specific serial port functions, and
  *	the "serial" channel driver.
  *
- * Copyright (c) 1999 by Scriptics Corp.
+ * Copyright © 1999 Scriptics Corp.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinSock.c b/win/tclWinSock.c
index 48b3cee..a31e1a2 100644
--- a/win/tclWinSock.c
+++ b/win/tclWinSock.c
@@ -3,7 +3,7 @@
  *
  *	This file contains Windows-specific socket related code.
  *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
+ * Copyright © 1995-1997 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinTest.c b/win/tclWinTest.c
index 91a3010..e924b1a 100644
--- a/win/tclWinTest.c
+++ b/win/tclWinTest.c
@@ -3,7 +3,7 @@
  *
  *	Contains commands for platform specific tests on Windows.
  *
- * Copyright (c) 1996 Sun Microsystems, Inc.
+ * Copyright © 1996 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinThrd.c b/win/tclWinThrd.c
index abd4f84..1095a6c 100644
--- a/win/tclWinThrd.c
+++ b/win/tclWinThrd.c
@@ -3,9 +3,9 @@
  *
  *	This file implements the Windows-specific thread operations.
  *
- * Copyright (c) 1998 by Sun Microsystems, Inc.
- * Copyright (c) 1999 by Scriptics Corporation
- * Copyright (c) 2008 by George Peter Staplin
+ * Copyright © 1998 Sun Microsystems, Inc.
+ * Copyright © 1999 Scriptics Corporation
+ * Copyright © 2008 George Peter Staplin
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
diff --git a/win/tclWinTime.c b/win/tclWinTime.c
index ef2b9d2..b18c83f 100644
--- a/win/tclWinTime.c
+++ b/win/tclWinTime.c
@@ -4,7 +4,7 @@
  *	Contains Windows specific versions of Tcl functions that obtain time
  *	values from the operating system.
  *
- * Copyright 1995-1998 by Sun Microsystems, Inc.
+ * Copyright © 1995-1998 Sun Microsystems, Inc.
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.