Rollup merge of #126604 - kadiwa4:uplift_double_negation, r=nnethercote

Uplift `clippy::double_neg` lint as `double_negations`

Warns about cases like this:
```rust
fn main() {
    let x = 1;
    let _b = --x; //~ WARN use of a double negation
}
```

The intent is to keep people from thinking that `--x` is a prefix decrement operator. `++x`, `x++` and `x--` are invalid expressions and already have a helpful diagnostic.

I didn't add a machine-applicable suggestion to the lint because it's not entirely clear what the programmer was trying to achieve with the `--x` operation. The code that triggers the lint should always be reviewed manually.

Closes #82987

0 files changed, 0 insertions, 0 deletions