* test/ruby/test_string.rb (TestString#test_chomp): add tests to chomp substr * test/ruby/test_string.rb (TestString#test_chomp!): ditto git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59133 b2dd03c8-39d4-4d8f-98ff-823fe69b080e