While I'm here:
* Switch to GitHub for a while to keep the EXAMPLES option as the
useful examples aren't included with the sdist at the moment.
* Make package concurrent safe due to the example files that are
installed outside of Python's site-lib directory.
* Convert to option helpers.
* Add "do-test" target to make future QA easier.
PR: 259332
Reported by: Gian-Simon Purkert [1]
Approved by: maintainer timeout (14+ days)
MFH: 2021Q4
Security: 17702e54-3da0-11ec-b7e0-3085a9a95629