Reviewed by John

    Reviewed by John

        Fix for this bug:

        <rdar://problem/3977962> font loses bold style after pasting next to existing text and pressing return

        * khtml/editing/htmlediting.cpp:
        (khtml::InsertParagraphSeparatorCommand::calculateStyleBeforeInsertion): Problem here was
        that we were doing work in cases where we should not, and content whose style would have
        been correct if we had done nothing was getting clobbered. It turns out that extra work
        to apply style to the new paragraph added in this command only needs to be done if we're
        at the boundaries of a paragraph. Otherwise, content that is moved as part of the work
        of the command will lend their styles to the new paragraph without any extra work needed.
        So, make this position check and return unless at a paragraph boundary.

        New test:

        * layout-tests/editing/style/block-styles-007-expected.txt
        * layout-tests/editing/style/block-styles-007.html

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8679 268f45cc-cd09-0410-ab3c-d52691b4dbfc