Ignore bindings if not defined

lib/git/aliases_and_bindings.sh

@@ -101,11 +101,13 @@ complete -o nospace -o filenames -F _git_index_tab_completion $git_index_alias
 
 # Cross-shell key bindings
 _bind(){
+  if [ -n "$1" ]; then
     if [[ $shell == "zsh" ]]; then # zsh
       bindkey -s "$1" "$2"
     else # bash
       bind "\"$1\": \"$2\""
     fi
+  fi
 }
 
 case "$TERM" in