test-hooks: Don't hide the value of HG_PENDING
Hiding the value of HG_PENDING made it less obvious what was going on in case
of test failure
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.