Markless is an open document markup standard specified at

  https://shirakumo.org/docs/markless

Reference implementations of full parsers, a test suite, sample
documents, and more can be found on the same page.

This lexer implements a simpler version of Markless without
maintaining the standard component and directive stack. It also does
not distinguish every possible component type in Markless, as
Pygments/Chroma's types lack appropriate markers.

Nevertheless the lexer is useful enough to properly mark up syntax
constructs in Markless documents, especially aiding in distinguishing
syntactical elements from actual textual content at a glance.