src/tools/clippy/src/docs/neg_multiply.txt


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### What it does
Checks for multiplication by -1 as a form of negation.

### Why is this bad?
It's more readable to just negate.

### Known problems
This only catches integers (for now).

### Example
```
let a = x * -1;
```

Use instead:
```
let a = -x;
```