许杰友 Jieyou Xu (Joe) 0a2d708c31
Rollup merge of #134253 - nnethercote:overhaul-keywords, r=petrochenkov
Overhaul keyword handling

The compiler's list of keywords has some problems.
- It contains several items that aren't keywords.
- The order isn't quite right in a couple of places.
- Some of the names of predicates relating to keywords are confusing.
- rustdoc and rustfmt have their own (incorrect) versions of the keyword list.
- `AllKeywords` is unnecessarily complex.

r? ```@jieyouxu```
2024-12-18 22:56:53 +08:00
..
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