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master 5b9daab: ; * doc/lispref/text.texi (Substitution): Fix a recent c

From: Eli Zaretskii
Subject: master 5b9daab: ; * doc/lispref/text.texi (Substitution): Fix a recent change.
Date: Sun, 11 Jul 2021 06:16:15 -0400 (EDT)

branch: master
commit 5b9daab3a745577441b0966d0b8e2bb261cdb976
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    ; * doc/lispref/text.texi (Substitution): Fix a recent change.
 doc/lispref/text.texi | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/doc/lispref/text.texi b/doc/lispref/text.texi
index 71a8efe..b71748c 100644
--- a/doc/lispref/text.texi
+++ b/doc/lispref/text.texi
@@ -4399,7 +4399,8 @@ based on their character codes.
 @cindex replace characters
 This function replaces all occurrences of the character @var{old-char}
 with the character @var{new-char} in the region of the current buffer
-defined by @var{start} and @var{end}.
+defined by @var{start} and @var{end}.  Both characters must have the
+same length of their multibyte form.
 @cindex undo avoidance
 If @var{noundo} is non-@code{nil}, then @code{subst-char-in-region} does
@@ -4432,10 +4433,10 @@ ThXs Xs the contents of the buffer before.
 @defun subst-char-in-string fromchar tochar string &optional inplace
 @cindex replace characters in string
 This function replaces all occurences of the character @var{fromchar}
-with @var{tochar} in @var{string}.  Unless @var{inplace} is non-nil,
-substitution occurs in a copy of @var{string}.  In any case, the
-function returns the resulting string.  Both characters must have the
-same multi-byte length.
+with @var{tochar} in @var{string}.  By default, substitution occurs in
+a copy of @var{string}, but if the optional argument @var{inplace} is
+non-@code{nil}, the function modifies the @var{string} itself.  In any
+case, the function returns the resulting string.
 @end defun
 @deffn Command translate-region start end table

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