make `view diff on commit` a feature that is easy to use

[Matt Mackall]

On Tue, 2014-11-04 at 23:50 +0300, anatoly techtonik wrote:
> This looks like a killer feature to me. Is it why hgeditor is located in
> the root of Mercurial repository and not in contrib/ ?

It's there because this feature is so old (May 2005, v0.5) that it
predates contrib/ (Jun 2005, v0.6). But it is intended as just an
example.

-- 
Mathematics is the supreme nostalgia of our time.