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-rw-r--r--doc/ref/api-data.texi2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/ref/api-data.texi b/doc/ref/api-data.texi
index 5017165c0..f2450cea2 100644
--- a/doc/ref/api-data.texi
+++ b/doc/ref/api-data.texi
@@ -3366,7 +3366,7 @@ Change every character in @var{str} between @var{start} and
@var{end} to @var{fill}.
@lisp
-(define y "abcdefg")
+(define y (string-copy "abcdefg"))
(substring-fill! y 1 3 #\r)
y
@result{} "arrdefg"