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-rw-r--r--src/fileio.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/fileio.c b/src/fileio.c
index 66ea761ca56..37948bc0ee9 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -508,7 +508,8 @@ This operation exists because a directory is also a file, but its name as
a directory is different from its name as a file.
The result can be used as the value of `default-directory'
or passed as second argument to `expand-file-name'.
-For a Unix-syntax file name, just appends a slash. */)
+For a Unix-syntax file name, just appends a slash unless a trailing slash
+is already present. */)
(Lisp_Object file)
{
char *buf;