Pre-patch, the man page encased the name of the program in quotes,
which is inconsistent with other man pages, unnecessarily
repeated "Shell" in the gist, and included "the" in the gist,
which is also inconsistent with other man pages.
The URLs of the form `help://man/<section>/<page>` link to another help
page inside the help application. All previous relative page links are
replaced by this new form. This doesn't change any behavior but it looks
much nicer :^)
Note that man doesn't handle these new links, but the previous relative
links didn't work either.
