A series of small patches have been applied to styleguide.

composer require --dev typo3/cms-styleguide:~9.2.1

Resolves: #86325
Releases: master
Change-Id: I94ba7a2e0d3c8a65fe5f21d3f7863d3984f34af3
Reviewed-on: https://review.typo3.org/58348


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>