- fixed <rdar://problem/4239051> Sometimes "Copy Link" in Safari results in a 
        URL on the pasteboard with no usable "title"

        * History/WebURLsWithTitles.m:
        (+[WebURLsWithTitles writeURLs:andTitles:toPasteboard:]):
        trim whitespace from titles that are put on pasteboard. This leaves an empty string
        for the title in cases where there's no displayed text, like an image in an <a> element
        that happens to have whitespace in the source, e.g. <a href="foo"> <img whatever></a>



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@13362 268f45cc-cd09-0410-ab3c-d52691b4dbfc