widening: trust user to give full "known" set
The new narrow_widen wire protocol command is supposed to return data
for exactly the revisions that the client requested (in order for it
to be strip-free). So we should not add ancestors the client didn't
ask for.
Differential Revision: https://phab.mercurial-scm.org/D7098
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
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$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
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See https://mercurial-scm.org/ for detailed installation
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