Remove redundant condition from text_output_indent

git-svn-id: https://pugixml.googlecode.com/svn/trunk@1037 99668b35-9821-0410-8761-19e4c4f06640
tests: Add missing tests to increase code coverage

git-svn-id: https://pugixml.googlecode.com/svn/trunk@1038 99668b35-9821-0410-8761-19e4c4f06640
tests: Add a test to verify that xml_document object works with any valid pointer alignment

git-svn-id: https://pugixml.googlecode.com/svn/trunk@1039 99668b35-9821-0410-8761-19e4c4f06640