(ediff-patch-file): Clarify doc string

Fixes: debbugs:3138

2 files changed, 3 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 8ae1978b849..361b2d8087f 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,7 @@
 2011-07-11  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
+        * vc/ediff.el (ediff-patch-file): Clarify doc string (bug#3138).
+
         * cus-edit.el (custom-guess-name-alist): -alist variables should
         use the `alist' type (bug#3120).  Suggested by Drew Adams.
 
diff --git a/lisp/vc/ediff.el b/lisp/vc/ediff.el
index 5e352493dc9..464fdc0a589 100644
--- a/lisp/vc/ediff.el
+++ b/lisp/vc/ediff.el
@@ -1348,7 +1348,7 @@ buffer."
 
 ;;;###autoload
 (defun ediff-patch-file (&optional arg patch-buf)
-  "Run Ediff by patching SOURCE-FILENAME.
+  "Query for a file name, and then run Ediff by patching that file.
 If optional PATCH-BUF is given, use the patch in that buffer
 and don't ask the user.
 If prefix argument, then: if even argument, assume that the patch is in a