When editing a page, it would help to have a "preview changes" or "show diff" button, which brings up a diff from the current page content to the proposed new page content. --[[JoshTriplett]]

Some discussion from the main [[/index/discussion]] page:

>It would be nice to be able to have a button to show "Differences" (or "Show Diff") when
>editing a page. Is that an option that can be enabled?
>
>> It's doable, it could even be done by a [[todo/plugin]], I think.
>> --[[Joey]]
>>

See the [[plugins/editdiff]] plugin --[[JeremieKoenig]]

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