log: use revsetlang.formatspec() thoroughly
This patch replaces %(val)s and %(val)r with %r (expression) and %s (string)
respectively. _matchfiles() is the exception as it takes a list of string
parameters.
"--prune REV" could take a revset expression if it were "ancestors(%(val)s)",
but this patch doesn't change the existing behavior.
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.