[ruby/optparse] Completion scripts themselves are not executable

https://github.com/ruby/optparse/commit/65d8aff935

misc/rb_optparse.bash

@@ -1,4 +1,5 @@
-#! /bin/bash
+# -*- bash -*-
+#
 # Completion for bash:
 #
 # (1) install this file,

misc/rb_optparse.zsh

@@ -1,4 +1,5 @@
-#!/bin/zsh
+# -*- zsh -*-
+#
 # Completion for zsh:
 # (based on <http://d.hatena.ne.jp/rubikitch/20071002/zshcomplete>)
 #