Auto merge of #140912 - fmease:rollup-rwtn31e, r=fmease

Rollup of 7 pull requests

Successful merges:

 - #140792 (Use intrinsics for `{f16,f32,f64,f128}::{minimum,maximum}` operations)
 - #140795 (Prefer to suggest stable candidates rather than unstable ones)
 - #140865 (Make t letter looks like lowercase rather than uppercase)
 - #140878 (Two expand-related cleanups)
 - #140882 (Split duration_constructors to get non-controversial constructors out)
 - #140886 (Update deps of bootstrap for Cygwin)
 - #140903 (test intrinsic fallback bodies with Miri)

r? `@ghost`
`@rustbot` modify labels: rollup