Rollup of 7 pull requests
Successful merges:
- #75802 (resolve: Do not put nonexistent crate `meta` into prelude)
- #76607 (Modify executable checking to be more universal)
- #77851 (BTreeMap: refactor Entry out of map.rs into its own file)
- #78043 (Fix grammar in note for orphan-rule error [E0210])
- #78048 (Suggest correct place to add `self` parameter when inside closure)
- #78050 (Small CSS cleanup)
- #78059 (Set `MDBOOK_OUTPUT__HTML__INPUT_404` on linkchecker)
Failed merges:
r? `@ghost`
043eca7f0b