D7258: makefile: use python3 by default (BC)

[mharbison72 (Matt Harbison)]

mharbison72 added a comment.
mharbison72 added subscribers: durin42, mharbison72.


  This will break Windows by default, because py3 is still named `python.exe`.  Alternately, I've been using using `PYTHON="py -3"` to invoke `make`.
  
  The command issued to the buildbot will need to explicitly use `PYTHON="py -2"` to keep that happy.  Probably also need to invoke `run-tests.py` with the right python too, so that `$PYTHON` is correct.  It looks like the shebang lines are already `$PYTHON`, through some aren't quoted.
  
  CC @durin42

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7258/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7258

To: indygreg, #hg-reviewers, martinvonz
Cc: mharbison72, durin42, dlax, martinvonz, mercurial-devel