error: an implementation of `From` is preferred since it gives you `Into<_>` for free where the reverse isn't true
  --> $DIR/from_over_into.rs:6:1
   |
LL | / impl Into<StringWrapper> for String {
LL | |     fn into(self) -> StringWrapper {
LL | |         StringWrapper(self)
LL | |     }
LL | | }
   | |_^
   |
   = note: `-D clippy::from-over-into` implied by `-D warnings`
   = help: consider to implement `From` instead

error: aborting due to previous error