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
echo This is file a1 > a
hg add a
hg commit -m "commit #0" -d "0 0"
ls
echo This is file b1 > b
hg add b
hg commit -m "commit #1" -d "0 0"
hg co 0
# B should disappear
ls