tests/test-merge-force.out

color: add --color switch

--color works like GNU grep --color. --color=auto only colorizes output
for non-dumb terminals that are TTYs.

created new head
% local deleted a file, remote removed
abort: outstanding uncommitted changes
resolving manifests
removing a
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
(branch merge, don't forget to commit)
% should show a as removed
R a
% manifest. should not have a:
b