color: don't crash on invalid status codes (issue2036)
If an unknown file with a newline appears in the status output, color
shouldn't raise a KeyError trying to parse second line in the filename.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
removing b
created new head
% should abort
abort: crosses branches (use 'hg merge' to merge or use 'hg update -C' to discard changes)
% should succeed
1 files updated, 0 files merged, 0 files removed, 0 files unresolved