Added a test to cover XML newline strings.
Added a test to cover XML newline strings.

aws/aws-sdk-ruby,llooker/aws-sdk-ruby,cjyclaire/aws-sdk-ruby,aws/aws-sdk-ruby,hamadata/aws-sdk-ruby,aws/aws-sdk-ruby,llooker/aws-sdk-ruby,cjyclaire/aws-sdk-ruby,hamadata/aws-sdk-ruby,cjyclaire/aws-sdk-ruby,llooker/aws-sdk-ruby,takeyuweb/aws-sdk-ruby,takeyuweb/aws-sdk-ruby,takeyuweb/aws-sdk-ruby,hamadata/aws-sdk-ruby