py3: add b'' prefixes in tests/test-bdiff.py
This makes the test close to passing
# skip-blame because just b'' prefixes
Differential Revision: https://phab.mercurial-scm.org/D4695
py3: fix kwargs handling in hgext/absorb.py
This fixes couple of tests on Python 3. There is only one absorb test left
failing on Python 3.
Differential Revision: https://phab.mercurial-scm.org/D4694
filelog: stop proxying headrevs() (API)
The previous commit removed the last user of this method. It is
redundant with heads() and adds little to no value other than
convenience. Let's nuke it.
Differential Revision: https://phab.mercurial-scm.org/D4663