Merge pull request #179 from Kosette/master

fix potential compatibilty issue for some fish shell versions and add…

Author: skywind3000

z.lua

@@ -2423,7 +2423,9 @@ function _zlua
 end
 
 if test -z "$_ZL_CMD"; set -x _ZL_CMD z; end
-alias "$_ZL_CMD"=_zlua
+function $_ZL_CMD -w _zlua -d "alias $_ZL_CMD=_zlua"
+	_zlua $argv
+end
 ]]
 
 script_init_fish = [[