Add revlog.LookupError exception, and use it instead of RevlogError.
Remove repo.LookupError, which devolves to the revlog version.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
abort: Permission denied: test-ro-message/b/vehicle