* lisp/vc/vc-git.el (vc-git-annotate-switches): Add useful tip.

diff --git a/lisp/vc/vc-git.el b/lisp/vc/vc-git.el
index 4c409465860201e0aa016dd8efca709305f438ae..5c21a5b884e87aaa1fcb9bbbeedd7c10ba41cdc6 100644 (file)
--- a/lisp/vc/vc-git.el
+++ b/lisp/vc/vc-git.el
@@ -122,7 +122,10 @@ If nil, use the value of `vc-diff-switches'.  If t, use no switches."
 
 (defcustom vc-git-annotate-switches nil
   "String or list of strings specifying switches for Git blame under VC.
-If nil, use the value of `vc-annotate-switches'.  If t, use no switches."
+If nil, use the value of `vc-annotate-switches'.  If t, use no switches.
+
+Tip: Set this to \"-w\" to make Git blame ignore whitespace when
+comparing changes.  See Man page `git-blame' for more."
   :type '(choice (const :tag "Unspecified" nil)
                 (const :tag "None" t)
                 (string :tag "Argument String")