[PATCH v3 1/7] emacs: help: check for nil key binding

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+From: Mark Walters <markwalters1009@gmail.com>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH v3 1/7] emacs: help: check for nil key binding\r
+Date: Fri,  8 Nov 2013 17:40:13 +0000\r
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+\r
+A standard way to unset a key binding is local-unset-key which is equivalent to\r
+  (define-key (current-local-map) key nil)\r
+\r
+Currently notmuch-help gives an error and fails if a user has done this.\r
+\r
+To fix this we only add a help line if the binding is non-nil.\r
+---\r
+ emacs/notmuch-lib.el |    2 +-\r
+ 1 files changed, 1 insertions(+), 1 deletions(-)\r
+\r
+diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el\r
+index 921ed20..ec5a2cb 100644\r
+--- a/emacs/notmuch-lib.el\r
++++ b/emacs/notmuch-lib.el\r
+@@ -254,7 +254,7 @@ prefix argument.  PREFIX and TAIL are used internally."\r
+           (setq tail\r
+                 (notmuch-describe-keymap\r
+                  binding ua-keys (notmuch-prefix-key-description key) tail)))\r
+-         (t\r
++         (binding\r
+           (when (and ua-keys (symbolp binding)\r
+                      (get binding 'notmuch-prefix-doc))\r
+             ;; Documentation for prefixed command\r
+-- \r
+1.7.9.1\r
+\r