Use `width_heuristics` in the options docs
It was using an older name
@@ -271,7 +271,7 @@ fn lorem<Ipsum, Dolor, Sit, Amet>() -> T
}
```
-## `use_small_heuristics`
+## `width_heuristics`
Whether to use different formatting for items and expressions if they satisfy a heuristic notion of 'small'.
