[Trac] HTTP GET methods for wiki changed recently?

[Phil Mocek]

I noticed that a Trac wiki page version diff was, until recently,
written like this:

    <http://projects.edgewall.com/trac/wiki/TracGuide?version=2&diff=yes>

But Trac now silently fails when the information is requested in
that manner, serving the version of the page specified in the URI,
but without the requested diff.

Apparently this is now correct:

    <http://projects.edgewall.com/trac/wiki/TracGuide?action=diff&version=2>

Is this change documented anywhere?  A quick search of Trac
project tickets didn't turn up anything relevant.  It's an
unfortunately non-backwards-compatible change.

-- 
Phil Mocek