[REQUEST] another --cleanup mode for commit

Hey.

Right now, all --cleanup modes for commit (except verbatim) seem to remove all "unnecessary" whitespace and collapse consecutive empty lines.

I use already vim to show me any such things and when I don't remove it then, this usually means I want to have it intentionally (especially consecutive empty lines).

Now obviously I could do things like --no-status, but I actually like the status to be shown - as I like it to be automatically removed. ;-)

So it would be great if one could have another cleanup mode which
basically does just the following:
- remove any trailing lines that start with # and the one newline (which
  is automatically added with the status) before these
  e.g.
    foo
    #bar
  
    #status
  yields in:
    foo
    #bar
  e.g.
    foo
    #bar
    #status
  yields in:
    foo

- apart form that, leave any whitespace, new lines, etc. as is

Cheers, Chris.