About `fill-paragraph` in `markdown-mode`

Question

I have a buffer on markdown-mode with the following contents.

        10         20        30        40        50        60        70

- a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
  a a a a a a a a a a a a a a a a a a a a a a a a


- A aaaaaa aa aa aaaaaaa. Aaa aaaa aaaaaa a
  aaaaaaaaaa. Aaaaaa-a. (progn (set-fill-column 70) (fill-paragraph))

If I place the cursor after the last parenthesis and running eval-last-sexp, nothing changes. I expected something like the following

        10         20        30        40        50        60        70

- a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
  a a a a a a a a a a a a a a a a a a a a a a a a


- A aaaaaa aa aa aaaaaaa. Aaa aaaa aaaaaa a aaaaaaaaaa. Aaaaaa-a.
  (progn (set-fill-column 70) (fill-paragraph))

Why does this happen? Same happens if I am on text-mode.

Answer 1

The paragraph is already filled.

If you add another SPC char after the period (.) then you see the paragraph filled differently. Or if you set variable (option) sentence-end-double-space to nil then you'll also see it filled differently.