[RFC]: Uniform indentation for lists

[Jambunathan K <kjambunathan@gmail.com>]

This request is a result of adding Org-mode support to Oddmuse.  (See my
earlier mail that introduces Orgmuse).

When lists are "normalized", the sub-lists are introduced by varying
amout of spaces depending on the type of the parent list.  It's 3 spaces
if the parent is numbered and 2 spaces if the parent is bulleted.

1. One
2. Two
   - Bullet One
   - Bullet Two
     1. One
     2. Two

Oddmuse wiki and possibly Usemod (and even other Wiki engines) do a
linear scan of text (much like what the old org-html.el used to do) and
emits HTML by looking at thing at point.  Having the list items
introduced by varying amout of spaces makes the parser "more" stateful.

I was wondering whether there would be some interest in 

  1) To eliminate the separators - "." or ")" - in the numbered list 
  2) Enhance the list repair routine so that it will alway indent by 3 spaces.

With (1) above, the earlier list becomes,

1 One
2 Two
  - Bullet One
  - Bullet Two
    1 One
    2 Two

This gives a uniform indentation of 2 spaces.


With (2) or (3), the earlier list becomes,

1. One
2. Two
   - Bullet One
   - Bullet Two
      1. One
      2. Two

This gives an indentation of 3 spaces.  The 3 spaces could either be
mandated by the canonical Org-markup spec or it could be ensured by the
author of Org document himself (by using the proposed new repair option)