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revset: special case commonancestors(none()) to be empty set...
revset: special case commonancestors(none()) to be empty set This matches the behavior of ancestor(none()). From an implementation perspective, ancestor() and commonancestors() are intersection, and ancestors() is union, so it would make some sense that commonancestors(none()) returned all revisions. However, ancestor(none()) isn't implemented as such, which breaks ancestor(x) == max(commonancestors(x)). From a user perspective, ancestors of nothing is nothing whichever type of operation the ancestor predicate does.
Yuya Nishihara -
r38727:e4b270a3 default
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Before you install




This is an OS X version of Mercurial that depends on the default Python installation.




After you install




This package installs the hg executable as /usr/local/bin/hg. See hg debuginstall for more info on file locations.




Documentation




Visit the https://mercurial-scm.org/">Mercurial web site and wiki




There's also a free book, https://book.mercurial-scm.org/">Distributed revision control with Mercurial




Reporting problems




If you run into any problems, please file a bug online:


https://bz.mercurial-scm.org/">https://bz.mercurial-scm.org/


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