Fixes incorrect formatting in array's documentation.

Author: Nathaniel Ringo

src/libstd/primitive_docs.rs

@@ -277,7 +277,7 @@ 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]`)
+/// - [`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]