Don't use sed -r; instead use old-style regexp
Rev
d895158fe8af introduced some sed -r tests, but -r is only available on GNU
sed, while BSD sed uses -E. Better to use old-style regular expressions, that
way the tests work on all sed variants.
adding foo
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
adding foo
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rev offset length base linkrev nodeid p1 p2
0 0 0 0 0 b80de5d13875 000000000000 000000000000
1 0 24 0 1 0376abec49b8 000000000000 000000000000