Add doc(hidden) to all __iterator_get_unchecked

This method on the Iterator trait is doc(hidden), and about half of
implementations were doc(hidden). This adds the attribute to the
remaining implementations.

Author: jsha

library/alloc/src/collections/vec_deque/into_iter.rs

@@ -38,6 +38,7 @@ impl<T> Iterator for IntoIter<T> {
     }
 
     #[inline]
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> Self::Item
     where
         Self: TrustedRandomAccess,

library/alloc/src/collections/vec_deque/iter.rs

@@ -103,6 +103,7 @@ impl<'a, T> Iterator for Iter<'a, T> {
     }
 
     #[inline]
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> Self::Item
     where
         Self: TrustedRandomAccess,

library/alloc/src/collections/vec_deque/iter_mut.rs

@@ -89,6 +89,7 @@ impl<'a, T> Iterator for IterMut<'a, T> {
     }
 
     #[inline]
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> Self::Item
     where
         Self: TrustedRandomAccess,

library/alloc/src/vec/into_iter.rs

@@ -163,6 +163,7 @@ impl<T, A: Allocator> Iterator for IntoIter<T, A> {
         self.len()
     }
 
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, i: usize) -> Self::Item
     where
         Self: TrustedRandomAccess,

library/core/src/array/iter.rs

@@ -132,6 +132,7 @@ impl<T, const N: usize> Iterator for IntoIter<T, N> {
     }
 
     #[inline]
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> Self::Item
     where
         Self: TrustedRandomAccess,

library/core/src/iter/adapters/cloned.rs

@@ -58,6 +58,7 @@ where
         self.it.map(T::clone).fold(init, f)
     }
 
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> T
     where
         Self: TrustedRandomAccess,

library/core/src/iter/adapters/copied.rs

@@ -74,6 +74,7 @@ where
         self.it.count()
     }
 
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> T
     where
         Self: TrustedRandomAccess,

library/core/src/iter/adapters/enumerate.rs

@@ -111,6 +111,7 @@ where
     }
 
     #[rustc_inherit_overflow_checks]
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> <Self as Iterator>::Item
     where
         Self: TrustedRandomAccess,

library/core/src/iter/adapters/fuse.rs

@@ -114,6 +114,7 @@ where
     }
 
     #[inline]
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> Self::Item
     where
         Self: TrustedRandomAccess,

library/core/src/iter/adapters/map.rs

@@ -122,6 +122,7 @@ where
         self.iter.fold(init, map_fold(self.f, g))
     }
 
+    #[doc(hidden)]
     unsafe fn __iterator_get_unchecked(&mut self, idx: usize) -> B
     where
         Self: TrustedRandomAccess,