11fa1764ee
All the implementations of the trait already are `Copy`, and this seems to be enough to simplify the implementations enough to make the MIR inliner willing to inline basics like `Range::next`.
The goal of this directory is to track the quality of MIR that is given to codegen in a standard -O condiguration.
As such, feel free to --bless whatever changes you get here, so long as doing so doesn't add substantially more MIR.