2008-05-07  Justin Garcia  <justin.garcia@apple.com>

        Reviewed by John Sullivan.

        <rdar://problem/5666354> Crashes in Mail at WebCore::RemoveNodeCommand::doApply
        
        When a single tab or series of tabs was copied, we weren't putting them into a 
        tab span.  On Paste, we would be given a text node with a single tab or series
        of tabs in it, and we would crash when inserting it at the start of a block
        (where that kind of text becomes completely unrendered).

        * editing/ReplaceSelectionCommand.cpp:
        (WebCore::ReplaceSelectionCommand::removeUnrenderedTextNodesAtEnds): Clean
        up correctly and early return if we removed everything that was inserted.
        * editing/markup.cpp:
        (WebCore::createMarkup):  Include the tab span when the only thing copied
        was a tab or a series of tabs.

LayoutTests:

2008-05-07  Justin Garcia  <justin.garcia@apple.com>

        Reviewed by John Sullivan.

        <rdar://problem/5666354> Crashes in Mail at WebCore::RemoveNodeCommand::doApply

        * editing/pasteboard/5761530-1-expected.txt: Added.
        * editing/pasteboard/5761530-1.html: Added.
        * editing/pasteboard/5761530-2-expected.txt: Added.
        * editing/pasteboard/5761530-2.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@32963 268f45cc-cd09-0410-ab3c-d52691b4dbfc