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.
+ hg init
+ hg add a
+ hg commit -m 1 -d 0 0
+ hg status
+ hg copy a b
+ hg status
A b
+ hg --debug commit -m 2 -d 0 0
b
b: copy a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
+ hg history
changeset: 1:3b5b84850bbe
tag: tip
user: test
date: Thu Jan 1 00:00:00 1970
summary: 2
changeset: 0:c19d34741b0a
user: test
date: Thu Jan 1 00:00:00 1970
summary: 1
+ hg log a
changeset: 0:c19d34741b0a
user: test
date: Thu Jan 1 00:00:00 1970
summary: 1
566e338d09a089ba737c21e0d3759980 .hg/data/b.d
3268d2f51b2d2d423ff01b59eb6fbb14 bsum
70909ca2ecf494c71e9184b445e040ee asum
+ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 2 changesets, 2 total revisions