merge: tool.check = prompt will force an interactive merge check
tool.check = prompt can be used when the exit status of a merge
tool is unreliable but an explicit user signoff on the merge result is
acceptable.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.