test_m17n.rb: nil replacement
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43501 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_m17n.rb: nil replacement
nil is allowed as replacement.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43501 b2dd03c8-39d4-4d8f-98ff-823fe69b080e