It's time to look through the documentation to see if all new features have been documented and/or are findable for users in an appropriate place. This is a great beginners ticket because it allows playing with new Cython features and figuring out how they work.

• look through CHANGES.rst to see what features are new in the latest 3.0 alpha versions and which seem to be worth mentioning
• look in the documentation where you would expect this to be documented
• if it's already covered, perfect
• otherwise, search the documentation to see if it's mentioned elsewhere, and decide if that's the right place
• if not, write a paragraph or two and/or add a cross-ref from places where you think it's also worth mentioning
• if you add example code (examples are great!) make sure it compiles by adding it as a .pyx file under docs/examples/ to let the test suite pick it up
• preferably, use separate commits/updates for the different features.