export.unmarked
You pointed export at a README that has never carried the generated block, so there is nothing between markers for it to replace.
What it means
Section titled “What it means”The block between them is rewritten from the governed files, every character of it derived.
One command closes it, and it is derived rather than composed.
It is not the same finding on every project: target
What closes it
Section titled “What closes it”roadkeep export --readme— the block between them is rewritten from the governed files, every character of it derived