help: show all nested subsections of a section with `hg help foo.section`
Used to be that `hg help hgrc.paths` would show
"paths"
-------
Assigns symbolic names to repositories. The left side is the symbolic
name, and the right gives the directory or URL that is the location of the
repository. Default paths can be declared by setting the following
entries.
and stop there. Obviously the result seems better as shown in the
attached test.