convert: improve gnu arch source performance and other fixes
- Improve performance by reading 'replay' output instead of
calling 'delta' command after 'replay'. This increases speed
significantly.
- Some times 'replay' command might fail with conflicts (don't
know why), a new get from that revision just fixes it. So,
if something fails, get a fresh copy from that revision and
try from there.
fix syntax in coverage.py, fixing run-tests.py -C
d0576d065993 accidentally broke things.
fix to let test-hgwebdir pass
fixes a regression introduced in changeset
f25070ecf334