org-feed: Fix 034c176 merge resolution

Restore unrelated change from 528a274 (org-feed: Silence byte-compiler,
2016-01-07).

lisp/org-feed.el

@@ -24,7 +24,7 @@
 ;;
 ;;; Commentary:
 ;;
-;;  This module allows entries to be created and changed in an Org-mode
+;;  This module allows entries to be created and changed in an Org mode
 ;;  file triggered by items in an RSS feed.  The basic functionality
 ;;  is geared toward simply adding new items found in a feed as
 ;;  outline nodes to an Org file.  Using hooks, arbitrary actions can