strip: do not update branchcache during strip (issue3745)
At this moment, the cache is invalid, and will be thrown away.
Later the strip function will call the `localrepo.destroyed` method
that will update the branchmap cache.
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
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Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing:
$ make local # build for inplace usage
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See http://mercurial.selenic.com/ for detailed installation
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