subrepo: implement 'unshare' for Mercurial subrepos I think there's a slight hole here in that a subrepo could be shared, removed from .hgsub, and then it's not part of context.substate (so not iterated over). But the push command has the same hole IIRC, and I think removing a subrepo is an edge case. The import hack is a copy/paste of subrepo.subrepo().

share: move the implementation of 'unshare' to the 'hg' module This will be used to setup unsharing subrepos. Usually cmdutil is used for this purpose. But the implementation needs hg.copystore(), and the hg module already imports cmdutil.

show: use labelcset() template alias for work (and stack) views By reusing labelcset() template alias from map-cmdline.default we can now display obsolescence information in `hg show work/stack`.

phases: pass phase names to hooks instead of internal values

configitems: document the choice of using 'match' instead of 'search'

configitems: do not directly match generic items Before this changesets, a literal '.*:foo$' config would match a registered '.*:foo$' generic. This is wrong since generic should be matched through regular exception only. This changeset fixes this problem. Thanks for to Yuya Nishihara for spotting the issue.

obsfate: fix obsfate_printer with empty date list When the list of dates is empty, `min` and `max` would raises a ValueError. Protect against this case by checking that the date list is not empty. I didn't add a test because I couldn't find a reproducing test case.

config: gather allowdivergence under the evolution namespace Grouping all evolution related-config under the experimental.evolution namespace would helps the future migration outside [experimental]. Differential Revision: https://phab.mercurial-scm.org/D1155