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-rw-r--r--src/fns.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/fns.c b/src/fns.c
index e337c0958d5..7cc6d00afef 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -644,7 +644,8 @@ bind `w32-collate-ignore-punctuation' to a non-nil value, since
the codeset part of the locale cannot be \"UTF-8\" on MS-Windows.
If your system does not support a locale environment, this function
-behaves like `string-equal'.
+behaves like `string-equal', and in that case the IGNORE-CASE argument
+is ignored.
Do NOT use this function to compare file names for equality. */)
(Lisp_Object s1, Lisp_Object s2, Lisp_Object locale, Lisp_Object ignore_case)