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When not finding a method for a type, but finding it for a single other impl, special case the output to emit a single message instead of a list.
```
error[E0599]: no associated item named `C` found for struct `Fail<i32, u32>` in the current scope
--> $DIR/wrong-projection-self-ty-invalid-bivariant-arg2.rs:15:23
|
LL | struct Fail<T: Proj<Assoc = U>, U>(T);
| ---------------------------------- associated item `C` not found for this struct
...
LL | Fail::<i32, u32>::C
| ^ associated item not found in `Fail<i32, u32>`
|
= note: the associated item was found for `Fail<i32, i32>`
```
instead of
```
= note: the associated item was found for
- `Fail<i32, i32>`
```
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…uwer Rollup of 6 pull requests Successful merges: - #152998 (std: make `OsString::truncate` a no-op when `len > current_len`) - #153682 (Tweak E0599 note) - #153795 (Point turbofish inference errors at the uninferred generic arg) - #153994 (move `tests/ui/invalid` tests to new folders) - #154006 (attrs: Ignore ExprKind::Err when converting path attr expr to lit) - #154012 (unstable impl of `From<{i64, u64}> for f128`)
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When not finding a method for a type, but finding it for a single other impl, special case the output to emit a single message instead of a list.
instead of