Markdown: Thematic Breaks

language: markdown

Thematic break lines are not be wrapped. They require at least 3 characters of * - or _.

***               ¦                       ***               ¦
---               ¦               ->      ---               ¦
___               ¦                       ___               ¦

A paragraph can come immediately after.

***               ¦                       ***               ¦
paragraph         ¦               ->      paragraph text    ¦
text              ¦                                         ¦

Can be any length >= 3 and can contain spaces inbetween.

*** *** *** *** ***                       *** *** *** *** ***
paragraph         ¦               ->      paragraph text    ¦
text              ¦                                         ¦

The marker 3 characters don't have to be consecutive. As long as there are at least 3.

-  -  -           ¦                       -  -  -           ¦
paragraph         ¦               ->      paragraph text    ¦
text              ¦                                         ¦

Trailing spaces are allowed.

____·             ¦                       ____·             ¦
paragraph         ¦               ->      paragraph text    ¦
text              ¦                                         ¦

Up to 3 leading spaces are allowed (more and it's an indented code block instead, though that makes no difference to wrapping).

···----           ¦                       ···----           ¦
paragraph         ¦               ->      paragraph text    ¦
text              ¦                                         ¦

Can interrupt a paragraph. If --- is used, it would be a setext heading instead, though that makes no difference to wrapping.

some              ¦               ->      some paragraph    ¦
paragraph text    ¦                       text              ¦
***               ¦                       ***               ¦
and some          ¦                       and some more     ¦
more              ¦                                         ¦

Invalid cases

In these cases the break is invalid so will be wrapped into the paragraph instead:

--                ¦                       -- too few        ¦
too few           ¦               ->      characters        ¦
characters        ¦                                         ¦

*-*               ¦                       *-* characters not¦
characters not    ¦               ->      the same          ¦
the same          ¦                                         ¦

___ foo           ¦                       ___ foo extra     ¦
extra characters  ¦               ->      characters after  ¦
after             ¦                                         ¦

===               ¦                       === wrong         ¦
wrong             ¦               ->      characters        ¦
characters        ¦                                         ¦