This bug has been open because your package reported in the log that dodoc was called for non-existent, files. This is generally a lower-level mistake, but it's annoying as it fills with false positives the log of packages that might forget to die on doins failures. Please do correct this. Thanks. Diego, on behalf of the QA team
This is "handled" in Bug 262491, sadly without any action whatsoever.
This is solved in 2.20.3, offending file was "CHANGES"