Rollup merge of #45339 - xfix:patch-4, r=steveklabnik

Update array documentation for Clone trait changes

Just a note, for this to work, `T` doesn't have to `Copy`, `Clone` is sufficient. For instance, the following works.

```rust
fn x(a: &[String; 100]) -> [String; 100] {
    a.clone()
}
```

src/libstd/primitive_docs.rs

@@ -284,7 +284,6 @@ mod prim_pointer { }
 /// Arrays of sizes from 0 to 32 (inclusive) implement the following traits if
 /// the element type allows it:
 ///
-/// - [`Clone`][clone] (only if `T: `[`Copy`][copy])
 /// - [`Debug`][debug]
 /// - [`IntoIterator`][intoiterator] (implemented for `&[T; N]` and `&mut [T; N]`)
 /// - [`PartialEq`][partialeq], [`PartialOrd`][partialord], [`Eq`][eq], [`Ord`][ord]
@@ -299,8 +298,10 @@ mod prim_pointer { }
 /// entirely different types. As a stopgap, trait implementations are
 /// statically generated up to size 32.
 ///
-/// Arrays of *any* size are [`Copy`][copy] if the element type is [`Copy`][copy]. This
-/// works because the [`Copy`][copy] trait is specially known to the compiler.
+/// Arrays of *any* size are [`Copy`][copy] if the element type is [`Copy`][copy]
+/// and [`Clone`][clone] if the element type is [`Clone`][clone]. This works
+/// because [`Copy`][copy] and [`Clone`][clone] traits are specially known
+/// to the compiler.
 ///
 /// Arrays coerce to [slices (`[T]`)][slice], so a slice method may be called on
 /// an array. Indeed, this provides most of the API for working with arrays.