Although port has DOCS option, DOCSDIR and PORTDOCS set, and PORTDOCS created, no docs are actually installed. Either some docs should be installed, or these unused bits removed.
Also you should probably change MAINTAINER to your FreeBSD email address for all your ports.
A commit references this bug:
Date: Thu Sep 3 10:28:16 UTC 2015
New revision: 395944
- Remove everything related to DOCS as not documentation is actually installed
- Sort USE_PYTHON
Submitted by: amdmi3
Approved by: maintainer timeout (email@example.com, 3 months)