Print commit time/date from perspective of committer.
Previously, it was printed in the time zone of the reader, but with
the committer's time zone offset. It is now consistent.
%% no merges expected
%% merge of b expected
merging for b
merging b
%%
Contents of b should be "this is file b1"
This is file b1
%% merge expected!
merging for b
merging b
%% merge of b expected
merging for b
merging b