Amazing work on this release! I've needed so many of these features in stable Rust, and I'm so excited to get to use these. I mean, just yesterday I had to do

Amazing work on this release! I've needed so many of these features in stable Rust, and I'm so excited to get to use these. I mean, just yesterday I had to do some weird stuff to a for loop in order to iterate over all u8s in a cleanish way. Lovely, lovely work. I'm especially excited to see how clever the ref/ref-mut `match` inferring is. If it's reliable, that's gonna remove quite a bit of friction for newcomers. So cool!