I just tried adding this configuration
and was presented with java.lang.AssertionError: Documentation is outdated, please regenerate it according to the instructions in flink-docs/README.md. in ConfigOptionsDocsCompletenessITCase even though I did regenerate the docs. As it turns out, the line break is rendered differently: <br/> (supposed) vs. <br> (documented). Strangely, DescriptionHtmlTest#testDescriptionWithLineBreak does verify the supposed variant, so I don't know what's wrong here.