src/tools/clippy/src/docs/duplicate_underscore_argument.txt


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### What it does
Checks for function arguments having the similar names
differing by an underscore.

### Why is this bad?
It affects code readability.

### Example
```
fn foo(a: i32, _a: i32) {}
```

Use instead:
```
fn bar(a: i32, _b: i32) {}
```