From: Mark Walters <markwalters1009@gmail.com>
Date: Tue, 12 Nov 2013 20:10:53 +0000 (+0000)
Subject: emacs: help: check for nil key binding
X-Git-Tag: 0.17_rc1~41
X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=commitdiff_plain;h=a5ecdf390e4dca6a314cee1594ab3236ea62ca85

emacs: help: check for nil key binding

A standard way to unset a key binding is local-unset-key which is equivalent to
  (define-key (current-local-map) key nil)

Currently notmuch-help gives an error and fails if a user has done this.

To fix this we only add a help line if the binding is non-nil.
---

diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
index bc695119..4c615474 100644
--- a/emacs/notmuch-lib.el
+++ b/emacs/notmuch-lib.el
@@ -253,7 +253,7 @@ prefix argument.  PREFIX and TAIL are used internally."
 	    (setq tail
 		  (notmuch-describe-keymap
 		   binding ua-keys (notmuch-prefix-key-description key) tail)))
-	   (t
+	   (binding
 	    (when (and ua-keys (symbolp binding)
 		       (get binding 'notmuch-prefix-doc))
 	      ;; Documentation for prefixed command