Improve documentation of 'diff-font-lock-prettify'

* lisp/vc/diff-mode.el (diff-font-lock-prettify): Doc fix.

* etc/NEWS: Minor copyedits.

1 files changed, 5 insertions, 1 deletions

diff --git a/lisp/vc/diff-mode.el b/lisp/vc/diff-mode.el
index c4812e81d40..19f9c802d40 100644
--- a/lisp/vc/diff-mode.el
+++ b/lisp/vc/diff-mode.el
@@ -109,7 +109,11 @@ You can always manually refine a hunk with `diff-refine-hunk'."
                  (const :tag "Refine hunks during navigation" navigation)))
 
 (defcustom diff-font-lock-prettify nil
-  "If non-nil, font-lock will try and make the format prettier."
+  "If non-nil, font-lock will try and make the format prettier.
+
+This mimics the Magit's diff format by making the hunk header
+less cryptic, and on GUI frames also displays insertion and
+deletion indicators on the left fringe (if it's available)."
   :version "27.1"
   :type 'boolean)