Catching the mismatch

There are `clang-tidy` checks that check that the declaration parameter name matches the definition name. Nothing more fun than staring at code with a `int f(int a, int b)` declaration but a `int f(int b, int a)` typo in the definition. Though these tools can "read" comments to know that `/*b*/` at the definition site matches the declaration name as well.

See this Rust issue as well for when `_arg` naming is unwelcome: https://github.com/rust-lang/rust/issues/91074