FIx a mistake in what casts are allowed
@@ -866,7 +866,7 @@ well as the following additional casts. We write `*T` as short for either
| C-like enum | Integer type | Enum cast |
| `bool` or `char` | Integer type | Primitive to integer cast |
| `u8` | `char` | `u8` to `char` cast |
-| `*T`, `&T` or `&mut T`| `*V` where `V: Sized` \* | Pointer to pointer cast |
+| `*T` | `*V` where `V: Sized` \* | Pointer to pointer cast |
| `*T` where `T: Sized` | Numeric type | Pointer to address cast |
| Integer type | `*V` where `V: Sized` | Address to pointer cast |
| `&[T; n]` | `*const T` | Array to pointer cast |
