1 files changed, 15 insertions, 11 deletions
diff --git a/doc/PrintDbl.3 b/doc/PrintDbl.3
index 29cacdb..730794f 100644
--- a/doc/PrintDbl.3
+++ b/doc/PrintDbl.3
@@ -5,10 +5,8 @@
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\" 
-'\" RCS: @(#) $Id: PrintDbl.3,v 1.5 2004/10/07 14:44:33 dkf Exp $
-'\" 
-.so man.macros
 .TH Tcl_PrintDouble 3 8.0 Tcl "Tcl Library Procedures"
+.so man.macros
 .BS
 .SH NAME
 Tcl_PrintDouble \- Convert floating value to string
@@ -20,28 +18,34 @@ Tcl_PrintDouble \- Convert floating value to string
 .SH ARGUMENTS
 .AS Tcl_Interp *interp out
 .AP Tcl_Interp *interp in
-.VS
 Before Tcl 8.0, the \fBtcl_precision\fR variable in this interpreter
 controlled the conversion.  As of Tcl 8.0, this argument is ignored and
 the conversion is controlled by the \fBtcl_precision\fR variable
 that is now shared by all interpreters.
-.VE
 .AP double value in
 Floating-point value to be converted.
 .AP char *dst out
 Where to store the string representing \fIvalue\fR.  Must have at
 least \fBTCL_DOUBLE_SPACE\fR characters of storage.
 .BE
-
 .SH DESCRIPTION
 .PP
 \fBTcl_PrintDouble\fR generates a string that represents the value
 of \fIvalue\fR and stores it in memory at the location given by
 \fIdst\fR.  It uses \fB%g\fR format to generate the string, with one
-special twist: the string is guaranteed to contain either
-a ``.'' or an ``e'' so that it doesn't look like an integer.  Where
-\fB%g\fR would generate an integer with no decimal point, \fBTcl_PrintDouble\fR
-adds ``.0''.
-
+special twist: the string is guaranteed to contain either a
+.QW .
+or an
+.QW e
+so that it does not look like an integer.  Where \fB%g\fR would
+generate an integer with no decimal point, \fBTcl_PrintDouble\fR adds
+.QW .0 .
+.PP
+If the \fBtcl_precision\fR value is non-zero, the result will have
+precisely that many digits of significance.  If the value is zero
+(the default), the result will have the fewest digits needed to
+represent the number in such a way that \fBTcl_NewDoubleObj\fR
+will generate the same number when presented with the given string.
+IEEE semantics of rounding to even apply to the conversion.
 .SH KEYWORDS
 conversion, double-precision, floating-point, string