tests/test-ui-color.py.out

push: use "repo['.']" instead of old form "repo['']"

Note that this does not conflict with the commit message of my
previous patch: I found this after writing the previous patch
(besides, I very easily forget things).

Differential Revision: https://phab.mercurial-scm.org/D2965

warning
error
'buffered\n'
colored? True
colored? True