merge revision(s) 39858: [Backport #8135]

	* parse.y (simple_re_meta): escape all closing characters, not only
	  round parenthesis.  [ruby-core:53578] [Bug #8133]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@40169 b2dd03c8-39d4-4d8f-98ff-823fe69b080e