Rollup of 9 pull requests#94065

Closed

matthiaskrgr wants to merge 21 commits intorust-lang:masterfrom

matthiaskrgr:rollup-785cm01

Commits on Dec 4, 2021

Add documentation to more `From::from` implementations.
kpreid
committed

Commits on Jan 30, 2022

Use `optflag` for `--report-time`
smoelius
committed

Commits on Feb 14, 2022

Fix suggestion to slice if scurtinee is a reference to `Result` or `Option`
ChayimFriedman2
authored

Commits on Feb 15, 2022

Commits on Feb 16, 2022