test_readline.rb: try UTF-8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40332 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_readline.rb: try UTF-8
(test_input_metachar_multibyte): try to run under UTF-8 locale,
before skipping.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40332 b2dd03c8-39d4-4d8f-98ff-823fe69b080e