| ### What it does | |
| Warns about calling `str::trim` (or variants) before `str::split_whitespace`. | |
| ### Why is this bad? | |
| `split_whitespace` already ignores leading and trailing whitespace. | |
| ### Example | |
| ``` | |
| " A B C ".trim().split_whitespace(); | |
| ``` | |
| Use instead: | |
| ``` | |
| " A B C ".split_whitespace(); | |
| ``` |