copytrace: use the full copytracing method if only drafts are involved...
copytrace: use the full copytracing method if only drafts are involved
This patch adds the functionality to use the full copytracing even if
`experimental.copytrace = heuristics` in cases when drafts are involved.
This is also a part of copytrace extension in fbext.
This also adds tests which are also taken from fbext.
.. feature::
The `heuristics` option for `experimental.copytrace` performs full
copytracing if both source and destination branches contains non-public
changsets only.
Differential Revision:
https://phab.mercurial-scm.org/D625
