TortoiseSVN and some other Subversion clients have a cool feature for integration with issue trackers. By setting a few properties for a project, you can have automatically generated links to tracked issues directly from SVN commit messages. TortoiseSVN also supports a special input method for issue numbers in commit boxes for easier integration.
The basic property that must be set is bugtraq:url which lets SVN know how to form a URL from an issue number. This is a bit difficult with SourceForge, where there are in fact at least three trackers and each with its own URL scheme including the tracker identifier in the URL. Toying with the URL and removing both group and tracker identifiers results in an error. After playing around some more, I found the following URL that works like a charm for every group and any tracker so there isn’t even a need to figure out the group identifier.
It took me a while to figure out and I couldn’t find any mention of it online, so I thought I’d post it here to help others.
For more information on all of the related properties see TortoiseSVN’s page.