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-rw-r--r--doc/lispref/searching.texi6
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/lispref/searching.texi b/doc/lispref/searching.texi
index 33455114dac..ef1cffc446f 100644
--- a/doc/lispref/searching.texi
+++ b/doc/lispref/searching.texi
@@ -1790,8 +1790,10 @@ this.
This function copies @var{string} and searches it for matches for
@var{regexp}, and replaces them with @var{rep}. It returns the
modified copy. If @var{start} is non-@code{nil}, the search for
-matches starts at that index in @var{string}, so matches starting
-before that index are not changed.
+matches starts at that index in @var{string}, and the returned value
+does not include the first @var{start} characters of @var{string}.
+To get the whole transformed string, concatenate the first
+@var{start} characters of @var{string} with the return value.
This function uses @code{replace-match} to do the replacement, and it
passes the optional arguments @var{fixedcase}, @var{literal} and