Redmine

Our development team uses branches pretty thoroughly.
Therefore we are running for a few years a patched version for redmine which improves the display of a revision in order to ease the review of patches.

• Show basename of associated repository (often our issues require changes in several repositories)
• Show a link to the associated revision
• Show a link to the associated diff

I invested 2 hours to add a test for the attached patch, but was not successfull. If anybody gives me a hint about howto proceed, I am willing to invest some more time, as it is always a good idea to test the changes.

Running `RAILS_ENV=test bundle exec rake test:scm:functionals` results in `159 runs, 844 assertions, 26 failures, 0 errors, 0 skips`, but is about the same as running the master branch.

A similar issue was raised in https://www.redmine.org/issues/5386, but I never got any reponse to my patches supplied there.