nightly fails in CI because of clippy::needless_borrow

For example,

warning: this expression borrows a value the compiler would automatically borrow
   --> crates/tor-persist/src/fs.rs:152:36
    |
152 |         std::fs::write(&fname_tmp, (&output).as_bytes())?;
    |                                    ^^^^^^^^^ help: change this to: `output`
    |

warning: this expression borrows a value the compiler would automatically borrow
  --> crates/tor-llcrypto/src/pk/ed25519.rs:78:9
   |
78 |         (&pk).into()
   |         ^^^^^ help: change this to: `pk`
   |

Some of these are correct. For example, it seems to me that the first case could be just write(&.., &output).

Others are not; for example, taking the compiler's suggestion for the second one results in a compile error. This seems to be a bug in nightly, which I have just filed: https://github.com/rust-lang/rust/issues/93509