1 files changed, 5 insertions, 8 deletions
diff --git a/lisp/progmodes/bug-reference.el b/lisp/progmodes/bug-reference.el
index 861b0137cb0..813ecbe3847 100644
--- a/lisp/progmodes/bug-reference.el
+++ b/lisp/progmodes/bug-reference.el
@@ -1,4 +1,4 @@
-;; bug-reference.el --- buttonize bug references
+;; bug-reference.el --- buttonize bug references  -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 2008-2019 Free Software Foundation, Inc.
 
@@ -69,7 +69,7 @@ so that it is considered safe, see `enable-local-variables'.")
                 (get s 'bug-reference-url-format)))))
 
 (defcustom bug-reference-bug-regexp
-  "\\([Bb]ug ?#?\\|[Pp]atch ?#\\|RFE ?#\\|PR [a-z-+]+/\\)\\([0-9]+\\(?:#[0-9]+\\)?\\)"
+  "\\([Bb]ug ?#?\\|[Pp]atch ?#\\|RFE ?#\\|PR [a-z+-]+/\\)\\([0-9]+\\(?:#[0-9]+\\)?\\)"
   "Regular expression matching bug references.
 The second subexpression should match the bug reference (usually a number)."
   :type 'string
@@ -91,7 +91,7 @@ The second subexpression should match the bug reference (usually a number)."
 (bug-reference-set-overlay-properties)
 
 (defun bug-reference-unfontify (start end)
-  "Remove bug reference overlays from region."
+  "Remove bug reference overlays from the region between START and END."
   (dolist (o (overlays-in start end))
     (when (eq (overlay-get o 'category) 'bug-reference)
       (delete-overlay o))))
@@ -99,7 +99,7 @@ The second subexpression should match the bug reference (usually a number)."
 (defvar bug-reference-prog-mode)
 
 (defun bug-reference-fontify (start end)
-  "Apply bug reference overlays to region."
+  "Apply bug reference overlays to the region between START and END."
   (save-excursion
     (let ((beg-line (progn (goto-char start) (line-beginning-position)))
 	  (end-line (progn (goto-char end) (line-end-position))))
@@ -141,10 +141,7 @@ The second subexpression should match the bug reference (usually a number)."
 
 ;;;###autoload
 (define-minor-mode bug-reference-mode
-  "Toggle hyperlinking bug references in the buffer (Bug Reference mode).
-With a prefix argument ARG, enable Bug Reference mode if ARG is
-positive, and disable it otherwise.  If called from Lisp, enable
-the mode if ARG is omitted or nil."
+  "Toggle hyperlinking bug references in the buffer (Bug Reference mode)."
   nil
   ""
   nil