unclear definition of lifetime input positions in RFC 39 #165
Description
As I noted here, the current definition for "lifetime input position" does not make it 100% clear that when it says that certain lifetimes in an impl are in input position, that is solely for the purposes of inferring output lifetimes for other parts of the impl header, and has absolutely no effect on the method definitions within the impl.
I hope to have a PR to fix this and a few other typos shortly.