help: un-indent help topics
The help topics are reused in the HTML documentation, and there it
looks odd that whole sections are indented. We now only indent it for
output on the terminal.
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.