clarify the empty variable name issue ([Bug 549285])

1 files changed, 5 insertions, 4 deletions

diff --git a/doc/Tcl.n b/doc/Tcl.n
index 6bd8511..4ad1b63 100644
--- a/doc/Tcl.n
+++ b/doc/Tcl.n
@@ -5,7 +5,7 @@
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\" 
-'\" RCS: @(#) $Id: Tcl.n,v 1.3 1999/04/16 00:46:33 stanton Exp $
+'\" RCS: @(#) $Id: Tcl.n,v 1.4 2002/06/03 16:31:24 msofer Exp $
 '\"
 .so man.macros
 .TH Tcl n "8.1" Tcl "Tcl Built-In Commands"
@@ -82,13 +82,14 @@ Variable substitution may take any of the following forms:
 .RS
 .TP 15
 \fB$\fIname\fR
-\fIName\fR is the name of a scalar variable;  the name is terminated
-by any character that isn't a letter, digit, or underscore.
+\fIName\fR is the name of a scalar variable;  the name is a sequence
+of one or more characters that are a letter, digit, or underscore.
 .TP 15
 \fB$\fIname\fB(\fIindex\fB)\fR
 \fIName\fR gives the name of an array variable and \fIindex\fR gives
 the name of an element within that array.
-\fIName\fR must contain only letters, digits, and underscores.
+\fIName\fR must contain only letters, digits, and underscores,
+but may be an empty string.
 Command substitutions, variable substitutions, and backslash
 substitutions are performed on the characters of \fIindex\fR.
 .TP 15