Michael Howell 5271e32c46 Improve the function pointer docs
* Reduce duplicate impls; show only the `fn (T)` and include a sentence
  saying that there exists up to twelve of them.
* Show `Copy` and `Clone`.
* Show auto traits like `Send` and `Sync`, and blanket impls like `Any`.
2022-07-19 08:52:24 -07:00
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2022-07-19 08:52:24 -07:00