Fix regex in key_binding_not_set

Fixes #15

Author: Bruno Sutic

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ### master
+- bugfix in `key_binding_not_set`: the regex is now properly detecting key
+  bindings with `-r` flag.
 
 ### v2.1.0, 2014-12-12
 - check before binding `prefix + prefix` (@m1foley)

sensible.tmux

@@ -41,7 +41,7 @@ server_option_value_not_changed() {
 
 key_binding_not_set() {
 	local key="$1"
-	if $(tmux list-keys | grep -q "bind-key[[:space:]]\+${key}"); then
+	if $(tmux list-keys | grep -q "bind-key[[:space:]]\+\(-r[[:space:]]\+\)\?${key}"); then
 		return 1
 	else
 		return 0