1.0.3dev: added documentation to `normalize_rev`, `short_rev` and `display_rev` of `Repository` class for case that the given `rev` isn't found (refs #11777)


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/1.0-stable@13482 af82e41b-90c4-0310-8c96-b1721e28e2e2