Since let_else feature has been stable in 1.65.0, it's now unnecessary

update spec

fix: move specs in fire

This greatly simplifies how hard it is to set a custom bug report url; previously tools had to copy
the entire hook implementation.

- Switch clippy to the new hook

  This also adds a `extra_info` callback so clippy can include its own version number, which differs
  from rustc's.

- Call `install_ice_hook` in rustfmt

…r-errors

Implement RFC 3348, `c"foo"` literals

RFC: rust-lang/rfcs#3348
Tracking issue: rust-lang#105723

…t compile

Update Clippy

r? `@Manishearth`

Make the BUG_REPORT_URL configurable by tools

This greatly simplifies how hard it is to set a custom bug report url; previously tools had to copy
the entire hook implementation.

I haven't changed clippy in case they want to make the change upstream instead of the subtree, but
I'm happy to do so here if the maintainers want - cc ````@rust-lang/clippy````

Fixes rust-lang#109486.

…r=Jarcho

Add `MINIMAL_CFG_CONDITION` lint

I encountered a few cases where some code had:

```rust
#[cfg(any(unix))]
```

In this case, the `any` is useless. This lint checks this and also for the `all` condition.

```
changelog: [`unique_cfg_condition`]: Add new `UNIQUE_CFG_CONDITION` lint
```

Update URLs in Type Checking chapter

Updated links to `Adt`, `pat_ty` and `Tykind` in the "Type Checking" chapter of the book.

### Notes:
- For discussion about the whole project, please use the tracking issue for the project rust-lang#10597  (It also contains a timeline, discussions, and more information).

changelog: Fix broken links in "Type Checking" chapter of the book

Rustup

r? `@ghost`

changelog: none