CTAN Markdown: Horizontal Rules

If a line contains only three or more of the characters - (minus), * (star), or _ (underscore) then the complete line is rendered as horizontal rule. It is required that the first character of the line is one of those characters. Afterwards whitespace characters in such a line are ignored and are not considered relevant.

Note that --- interferes with the interpretation of sections. Thus the line before such a horizontal rule may not start with a letter.

abc

---
def  

abc
**********
def  

abc
_________________________
def  

abc
- - -
def  

abc
** ** ** ** **
def  

abc
__________     _______________
def