[BUGFIX] Fix build pipeline

This patch fixes some code issues with unit tests and HTML formatting
that were not noticed due to missing builds during the infrastructure
outage.

Resolves: #90363
Releases: master
Change-Id: Iab2e9965e711d0ca655c1105b16ec9a5434d3d87
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63208


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>