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Matt Harbison authored
The generated type annotations around `filemap()` and `files()` were slightly
modified by the pyupgrade series culminating in 70a75d379daf.  This module is
way more complicated than the other changes, but these weren't too bad to figure
out.

The typing caught a trivial issue in `sparse`- it was passing an empty data list
to `addfile()` for the `ACTION_REMOVE` case, instead of a tuple or None.
`merge.manifestmerge()` calls this function with None for the data, so 1) it has
to be typed as optional, and 2) is safe to pass None in the sparse code.
f3762eaf
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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.

Notes for packagers
===================

Mercurial ships a copy of the python-zstandard sources. This is used to
provide support for zstd compression and decompression functionality. The
module is not intended to be replaced by the plain python-zstandard nor
is it intended to use a system zstd library. Patches can result in hard
to diagnose errors and are explicitly discouraged as unsupported
configuration.