packaging: always execute builddeb from source root Without this, dockerdeb and the make targets that invoke it may fail depending on the pwd at the time of invocation.

perfmoonwalk: make work with filtered repo This also fixes the out-of-range "len(repo)" that weirdly works (and gets the nullid). I suspect it wasn't intentional to include the timing of reading the null revision. Differential Revision: https://phab.mercurial-scm.org/D4017

revlog: don't include trailing nullrev in revlog.revs(stop=len(revlog)) This was an odd side effect of the nullid entry that's in the index. The existing callers (mostly repair.py) seem to have handled it fine. It doesn't seem intentional, and it's pretty surprising, so let's remove that surprise. Differential Revision: https://phab.mercurial-scm.org/D4015

patchbomb: ensure all headers and values given to email mod are native strings This lets test-patch-bookmark.t only fail with some harmless header output changes on Python 3, so I think patchbomb might be basically useful on Python 3 now. Differential Revision: https://phab.mercurial-scm.org/D3952

context: delete an obsolete comment Obsolete since 91618801d5c3 (context: raise ProgrammingError on repo['my-tag'], 2018-07-06). Differential Revision: https://phab.mercurial-scm.org/D4002

templatekw: use ctx1.status(ctx2) instead of repo.status(ctx1, ctx2) Differential Revision: https://phab.mercurial-scm.org/D4001