Reviewed by Hyatt

    Reviewed by Hyatt

        Fix for this bug:

        <rdar://problem/3775316> document sprouts an extra newline character at the end

        * khtml/editing/htmlediting_impl.cpp:
        (khtml::InputNewlineCommandImpl::doApply): There was in insufficient check
        in the code which adds extra BR elements at the ends of blocks, which we do
        to work around the fact that BR elements, when they are the last element in a
        block, do not render. Now the code sees whether there already is one of these
        extra BR's in the document and won't add and "extra" extra.
        * layout-tests/editing/inserting/insert-3775316-fix.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7375 268f45cc-cd09-0410-ab3c-d52691b4dbfc