[patch] Recognize Subversion-style revision numbers (rNNNN) as a changeset link

[rmunn@…]

Currently (as of Trac 0.8), the Wiki recognizes [N] as a changeset link, and will recognize that syntax in commit log messages. But the traditional format for writing Subversion revision numbers is rNNNN. See, for instance, ​http://svnbook.red-bean.com/en/1.1/ch04s04.html, where commit log messages like "Merged my-calc-branch changes r406:480 into the trunk" or "Undoing change committed in r303" are given as examples.

I propose that WikiFormatter.py should recognize not just [N] format, but also rNNNN format, as a changeset link.

[rmunn@…]

Please note that I have not yet tested this patch. I should have a working Trac installation in a week or so; when I do, I'll test my patch and update this ticket if testing reveals any problems.

[cboos@…]

It works, but what gets actually displayed for e.g.
r123 is still the usual [123]. Was that intended?
I see no problem with that, however, it will tell
people the "right" notation to use :)

[cmlenz]

This notation has been added to the wiki formatter in [1224]. Forgot to mention this change in the log message, sorry. Only lower case 'r' prefix is matched.

[cboos]

r2165 added support for "Merged my-calc-branch changes r406:480 into the trunk"