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-rw-r--r--lisp/vc/diff.el4
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/vc/diff.el b/lisp/vc/diff.el
index 0a853c5d902..b29f9c10b18 100644
--- a/lisp/vc/diff.el
+++ b/lisp/vc/diff.el
@@ -60,7 +60,9 @@
(defun diff-sentinel (code &optional old-temp-file new-temp-file)
"Code run when the diff process exits.
CODE is the exit code of the process. It should be 0 only if no diffs
-were found."
+were found.
+If optional args OLD-TEMP-FILE and/or NEW-TEMP-FILE are non-nil,
+delete the temporary files so named."
(if old-temp-file (delete-file old-temp-file))
(if new-temp-file (delete-file new-temp-file))
(save-excursion