changing-files: add the ability to track merged files too
The set of merged files is used when doing changeset centric copy tracing (cf
`is_merged` in `mercurial/copies.py`. So tracking (and persisting) this set will
be useful. We start with adding the attribute on the new object.
Differential Revision: https://phab.mercurial-scm.org/D9087
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
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
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.