error: the loop variable `i` is only used to index `ns`.
  --> $DIR/needless_range_loop.rs:8:5
   |
8  | /     for i in 3..10 {
9  | |         println!("{}", ns[i]);
10 | |     }
   | |_____^
   |
   = note: `-D needless-range-loop` implied by `-D warnings`
help: consider using an iterator
   |
8  |     for <item> in ns.iter().take(10).skip(3) {
   |

error: the loop variable `i` is only used to index `ms`.
  --> $DIR/needless_range_loop.rs:29:5
   |
29 | /     for i in 0..ms.len() {
30 | |         ms[i] *= 2;
31 | |     }
   | |_____^
help: consider using an iterator
   |
29 |     for <item> in &mut ms {
   |

error: the loop variable `i` is only used to index `ms`.
  --> $DIR/needless_range_loop.rs:35:5
   |
35 | /     for i in 0..ms.len() {
36 | |         let x = &mut ms[i];
37 | |         *x *= 2;
38 | |     }
   | |_____^
help: consider using an iterator
   |
35 |     for <item> in &mut ms {
   |