Revision 554350

textproc/multimarkdown: update 6.5.2 to 6.6.0

  * Update to 6.6.0;
  * Update cheat sheet to latest snapshot.

  Release Notes:
  https://github.com/fletcher/MultiMarkdown-6/releases/tag/6.5.3
  https://github.com/fletcher/MultiMarkdown-6/releases/tag/6.6.0

PR:		250703
Submitted by:	Yasuhiro KIMURA <yasu % utahime.org>