[churn] Ignore merge csets
Merge changesets attributed a large number of lines to people that didn't
actually develop it, but simply merged the code. By ignoring merges, we get
a more accurate picture of how much code everyone changed.
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
verify failed
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
commit failed