This reverts commit 5bf49cc.

The false positive has been fixed.

```
warning: it is more concise to loop over references to containers instead of using explicit iteration methods
  --> examples/get.rs:91:44
   |
91 |                         for (key, item) in table.iter() {
   |                                            ^^^^^^^^^^^^ help: to write this more concisely, try: `table`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_iter_loop
   = note: `-W clippy::explicit-iter-loop` implied by `-W clippy::pedantic`
   = help: to override `-W clippy::pedantic` add `#[allow(clippy::explicit_iter_loop)]`
```