test-extension: do not depend on demandimport (issue5012) When demandimport is disabled, the test will fail because extroot/foo.py uses import outside PYTHONPATH. This is bad since we have a PyPy migration plan and it does not support demandimport. Fix by setting PYTHONPATH.

commands: split notes into note containers

remove: quote --force in never deletes note Split Note into a note container

import: reword no hunks partial note Split Note into a note container

merge: reword help to use See help resolve

py3compat: use absolute_import

patch: use absolute_import

mdiff: use absolute_import

scmposix: use absolute_import

scmutil: use absolute_import