wiki page version diff incorrectly displays some text duplicated

[Phil Mocek <pmocek-edgewall-tracwiki@…>]

Upon reviewing changes I made to Trac Project wiki page TracMultipleProjects, I found that
the page history diff display of two versions (27 & 28) displays the first word of the modified
text twice.

This can be observed by browsing to ​http://projects.edgewall.com/trac/wiki/TracMultipleProjects?version=28&diff=yes

I've verified that this shows up when using Safari 1.2.4, Firefox 1.0 (Mac OS X), w3m 0.4.1,
and w3m 0.5.1. Strangely, with w3m (both versions), the text [DEL::DEL] and [INS:INS]
is inserted between the duplicated words, as:

    34       '''Suggestion:''' [DEL::DEL] '''Suggestion:''' change [[:alnum:]] to [^/] because
            :alnum: notation does not support dashes in directory names
             '''Suggestion:''' [INS::INS] '''Suggestion:''' In the second ''RewriteRule''
            directive and in the ''LocationMatch'' directive, change {{{[[:alnum:]]}}} to {{{[[^

[cmlenz]

Fixed in [1314].