tests/test-context.py.out

subrepo: add shortid() method to subrepo classes

This method takes an "id" (e.g. a revision id) and returns a "short" version
(e.g. a short revision id).

This will be used on the next revision to fix a small bug in the way that the
text on the promptchoice shown when a subrepo diverges is generated.

workingfilectx.date = (1000, 0)
ASCII   : Gr?ezi!
Latin-1 : Grüezi!
UTF-8   : Grüezi!