log: fix the bug 'hg log --stat -p == hg log --stat'
Before:
hg log --stat -p -r tip # only show stat
After:
hg log --stat -p -r tip # show stat _and_ diff
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.