evolve: add comptability to read old evolvestate files
When a user runs `hg evolve` with old evolve where we used to write evolvestate
the old ways i.e. without using cbor, and faces conflicts, the evolve is
interrupted. If the user updates evolve before completing the evolve, that can
result in traceback as the new evolve cannot read the old evolvestate file.
The previous patch added function to read old evolvestate file and this patch
uses that when we encounter the above mentioned case.
.. Copyright © 2017 Pierre-Yves David <pierre-yves.david@octobus.net>
==============================================
Known limitations of the current documentation
==============================================
Features not covered by tutorials
=================================
Some of the *newer* features of evolution might not be reflected in the
documentation yet. You can directly check the inline documentation of the
extension itself for fresher details using `hg help -e evolve`.
Known undocumented features are:
* `hg prev`,
* `hg next`,
* `hg next --evolve`,
* `hg evolve --rev`,
* `hg evolve --list`,
* `hg obslog`,
* `hg split`,
* `hg metaedit`,
* `hg touch`,
* `hg amend --extract`,
* `hg pdiff`,
* `hg pstatus`,
* `hg amend -i`,
* various topic related elements (in particular `hg stack`),
Unreferenced Documents
======================
There are documents with content not linked in the flow of the main
documentation. Some might be outdated and some are too fresh to be integrated in
the main flow yet.
.. toctree::
:maxdepth: 1
evolve-faq
evolve-good-practice
obs-terms
tutorials/topic-tutorial
tutorials/tutorial