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clippy 0.0.155 - Docs.rs
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clippy 0.0.155

A bunch of helpful lints to avoid common pitfalls in Rust
Documentation 
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error: needlessly taken reference of both operands
  --> $DIR/op_ref.rs:13:15
   |
13 |     let foo = &5 - &6;
   |               ^^^^^^^
   |
   = note: `-D op-ref` implied by `-D warnings`
help: use the values directly
   |
13 |     let foo = 5 - 6;
   |               ^

error: aborting due to previous error