merge revision(s) r47098: [Backport #10117]

	* parse.y (parser_yylex): fix invalid char in eval, should raise
	  an syntax error too, as well as directly coded.
	  [ruby-core:64243] [Bug #10117]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@47268 b2dd03c8-39d4-4d8f-98ff-823fe69b080e