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Fix error recovery in format macro parsing Fixes #88770. Basically, the assumption in the following comment is incorrect: https://github.com/rust-lang/rust/blob/b69fe57261086e70aea9d5b58819a1794bf7c121/compiler/rustc_builtin_macros/src/format.rs#L167-L172 This is only true in the first iteration of the loop, when [`p.clear_expected_tokens()`](https://github.com/rust-lang/rust/blob/b69fe57261086e70aea9d5b58819a1794bf7c121/compiler/rustc_builtin_macros/src/format.rs#L164) is called. In subsequent iterations, `p.expected_tokens` won't be empty, so `p.expect()` won't actually call `unexpected_try_recover()`: https://github.com/rust-lang/rust/blob/b69fe57261086e70aea9d5b58819a1794bf7c121/compiler/rustc_parse/src/parser/mod.rs#L487-L498 Instead, it will call `expect_one_of()`, which _can_ recover and return `Ok()`. This PR handles this case to fix the ICE in #88770.
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- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.