Reviewed by John

    Reviewed by John

        Fix for this bug:

        <rdar://problem/4035648> REGRESSION (Mail): line feed in source HTML file causes bad copy/paste behavior

        The createMarkup() function in markup.cpp iterates over the nodes in a range,
        and does some bookkeeping to figure out when to add close tags to the markup.
        Some code added at the start of the loop to prevent markup from being written
        for unrendered nodes short-circuited the rest of the loop, and so prevented
        the close-tag-writing code from running when it should.

        This is why the "plain" text wound up inside of the bold tag in the example
        above. The addition of the unrendered return character caused an incorrect
        delay in the close tag for the bold element from being written out, with the
        result being that it wound up including additional content.

        The fix is to add checks for node renderers throughout the loop at the points
        where markup is written out for each node. This allows the additional close
        tag logic to run as needed.

        All layout tests pass with this change.

        * khtml/editing/markup.cpp:
        (khtml::createMarkup)

        New test:

        * layout-tests/editing/pasteboard/paste-4035648-fix-expected.txt: Added.
        * layout-tests/editing/pasteboard/paste-4035648-fix.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8805 268f45cc-cd09-0410-ab3c-d52691b4dbfc