DOC: Hide Array methods on impls

These just clutter up the docs. Most important that the users can see
the list of implemented array sizes, not the methods for each of those.

Author: bluss

src/array.rs

@@ -77,10 +77,13 @@ macro_rules! fix_array_impl {
         unsafe impl<T> Array for [T; $len] {
             type Item = T;
             type Index = $index_type;
+            #[doc(hidden)]
             #[inline(always)]
             fn as_ptr(&self) -> *const T { self as *const _ as *const _ }
+            #[doc(hidden)]
             #[inline(always)]
             fn as_mut_ptr(&mut self) -> *mut T { self as *mut _ as *mut _}
+            #[doc(hidden)]
             #[inline(always)]
             fn capacity() -> usize { $len }
         }