Reviewed by James Robinson.

        new-run-webkit-tests ignores trailing EOL differences in text tests
        https://bugs.webkit.org/show_bug.cgi?id=36983

        Changed the handling of new-line characters within new-run-webkit-tests
        to match old-run-webkit-tests.  Differences in leading and trailing empty
        lines in text expectation files are no longer ignored.

        * Scripts/webkitpy/layout_tests/port/base.py:
        * Scripts/webkitpy/layout_tests/port/test.py:
        Added unit tests.  Removed old duplicate unit test entries.
        * Scripts/webkitpy/layout_tests/test_types/text_diff.py:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@74362 268f45cc-cd09-0410-ab3c-d52691b4dbfc