Further help improvements:
Show command aliases in 'hg help something', unless in quiet mode.
Show short command description with 'hg help -q something'.
Show global options in verbose mode of command help.
State that Mercurial is a Distributed SCM.
#!/bin/sh
hg init
mkfifo p
hg serve --stdio < p &
P=$!
(echo lock; echo addchangegroup; sleep 5) > p &
Q=$!
sleep 1
kill -HUP $P
sleep 1
ls .hg