[Suggestion]: Multi line heading

[boltlessengineer]

Commonmark supports setext headings which allows user to put multiple lines as heading content.

This is a
Setext Heading
==============

In this way, multi line heading has at least one line of spacer with multiple = characters and they cannot be used without this spacer line. ATX heading in Commonmark can only span one line, so it can be used without any spacer line.

# ATX Heading
This doesn't belong to heading

Implementation

* Multi line
  Heading Title

  This is not a heading

* Single line Heading *
  This is not a heading

We can have similar syntax by specifying heading title as a paragraph and introducing heading closing modifier. Now you can use *\n to explicitly end the heading title.

This allows both heading and paragraph divided by line and *heading spanning only one line (no spacer line between) in same grammar base, which is way better than CommonMark's implementation.

You can think this syntax as a block style heading used in many programming langauges' comment section.

//// heading in comments ////

*** level 3 heading in Norg ***

As we already defined the level in heading prefix, suffix characters can repeated in any amount of times (including 0!)

Examples

Here is a list of valid syntax with this rule:

* Lv 1 Heading ******
Paragraph

****** Lv 6 Heading *
Paragraph


* Heading
  in
  multiple
  line *
  Paragraph