Use `slice::iter` instead of `into_iter` to avoid future breakage (#6)
Use `slice::iter` instead of `into_iter` to avoid future breakage (#6)

`an_array.into_iter()` currently just works because of the autoref
feature, which then calls `<[T] as IntoIterator>::into_iter`. But
in the future, arrays will implement `IntoIterator`, too. In order
to avoid problems in the future, the call is replaced by `iter()`
which is shorter and more explicit.
JelteF/defaultmap,JelteF/defaultmap