Improve doc string of 'M-.'

* lisp/progmodes/xref.el (xref-find-definitions): Mention 'M-,' in
the doc string.

diff --git a/lisp/progmodes/xref.el b/lisp/progmodes/xref.el
index b6ad4854070ec7e7a2d03e896484a3f6c26b400e..21f4abfccf496ce51e75127886ea3dc36e93199f 100644 (file)
--- a/lisp/progmodes/xref.el
+++ b/lisp/progmodes/xref.el
@@ -1309,7 +1309,9 @@ prompt for it.
 If sufficient information is available to determine a unique
 definition for IDENTIFIER, display it in the selected window.
 Otherwise, display the list of the possible definitions in a
-buffer where the user can select from the list."
+buffer where the user can select from the list.
+
+Use \\[xref-pop-marker-stack] to return back to where you invoked this command."
   (interactive (list (xref--read-identifier "Find definitions of: ")))
   (xref--find-definitions identifier nil))