cargo clippy detects lots of common mistakes to be improved about dynein HOT 2 CLOSED

$ cargo clippy 2>&1 | egrep "^warning:|^error:" | sort | uniq -c | sort -nr
     13 warning: redundant field names in struct initialization
     13 warning: length comparison to zero
      9 warning: writing `&String` instead of `&str` involves a new object where a slice will do.
      7 warning: redundant clone
      6 warning: Constants have by default a `'static` lifetime
      4 warning: identical conversion
      3 warning: unneeded unit expression
      3 warning: this import is redundant
      3 warning: called `.as_ref().map(Deref::deref)` (or with one of deref aliases) on an Option value. This can be done more directly by calling `cx.output.as_deref()` instead
      2 warning: use of `unwrap_or` followed by a function call
      2 warning: use of `expect` followed by a function call
      2 warning: taken reference of right operand
      2 warning: struct update has no effect, all the fields in the struct have already been specified
      2 warning: single-character string constant used as pattern
      2 warning: calling `to_string` on `&&str`
      1 warning: using `clone` on a `Copy` type
      1 warning: useless use of `format!`
      1 warning: unneeded `()`
      1 warning: this is an `else if` but the formatting might hide it
      1 warning: this boolean expression can be simplified
      1 warning: the variable `key_id` is used as a loop counter.
      1 warning: the variable `i` is used as a loop counter.
      1 warning: redundant closure found
      1 warning: called `.as_ref().map(Deref::deref)` (or with one of deref aliases) on an Option value. This can be done more directly by calling `s.as_deref()` instead
      1 warning: called `.as_ref().map(Deref::deref)` (or with one of deref aliases) on an Option value. This can be done more directly by calling `cx.clone().output.as_deref()` instead
      1 warning: You checked before that `unwrap()` cannot fail. Instead of checking and unwrapping, it's better to use `if let` or `match`.
      1 warning: You are using an explicit closure for cloning elements

$ cargo clippy
    Finished dev [unoptimized + debuginfo] target(s) in 0.08s