PlantUML code blocks in Markdown have once again stopped working
Code blocks fenced with ```plantuml ... ``` have stopped working correctly.
Correct behavior: code block is rendered as a diagram
Actual behavior: PlantUML code is displayed
This bug seems to keep appearing, getting fixed and then reappearing.
Note: Support for Mermaid is entirely insufficient as a work-around for this bug since Mermaid's repertoire of diagram types is inadequate and its rendering is primitive -- not to mention imposing the labor on GitLab users of downgrading countless existing diagrams to Mermaid's inferior syntax and behavior.