get rid of ruby-mode.el bugs

* lib/optparse.rb: get rid of confusing ruby-mode.el of Emacs 24,
  - if-end expression inside an expression
  - a comma just followed by a bar

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53752 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/optparse.rb

@@ -577,7 +577,7 @@ class OptionParser
         l = left[-1].length + s.length
         l += arg.length if left.size == 1 && arg
         l < max or sopts.empty? or left << ''
-        left[-1] << if left[-1].empty? then ' ' * 4 else ', ' end << s
+        left[-1] << (left[-1].empty? ? ' ' * 4 : ', ') << s
       end
 
       if arg