MD021 - Multiple spaces inside hashes on closed atx style header

Tags: headers, atx_closed, spaces

Aliases: no-multiple-space-closed-atx

This rule is triggered when more than one space is used to separate the header text from the hash characters in a closed atx style header:

#  Header 1  #

##  Header 2  ##

To fix this, separate the header text from the hash character by a single space:

# Header 1 #

## Header 2 ##

Note: this rule will fire if either side of the header contains multiple spaces.