Add option to have ordered list use only '1. ' instead of enumerating

[bklaase]

Almost all markdown viewers/renderers allow for the use of "1. " to denote a numbered list. so instead of

1. item1
2. item2
3. item3

one can write

1. item1
1. item2
1. item3

which will then renders as:

1. item1
2. item2
3. item3

Examples that implement this behavior are sphinx / readthedocs, github, emacs markdown preview, etc. I strongly prefer this option since when people reshuffle their ordered lists, and they don't have a nice editor, they can't make mistakes.

I looked at the code of markdown-insert-list-item and on line 6040 is the relevant part:

            (let* ((old-prefix (match-string 1))
                   (old-spacing (match-string 2))
                   (new-prefix (if old-prefix
                                   (int-to-string (1+ (string-to-number old-prefix)))
                                 "1"))

changing the check just for old-prefix and adding a check for a configuration option that could be named:
markdown-ordered-list-item-prefix-enumeration (default t, and when nil doesn't enumerate, but always inserts "1. ") would be exactly the behavior I am looking for.

Would this be acceptable?

[syohex]

Would this be acceptable?

Yes. Welcome PR.

[bklaase]

it's a very simple change, but make test:

Ran 495 tests, 492 results as expected, 0 unexpected, 3 skipped (2021-01-20 20:25:37+0100, 4.114589 sec)
1 expected failures