Revert link removal of

denisvasilik · denisvasilik · commit 83143a1ef4f0 · 2020-09-02T19:07:32.000+02:00
diff --git a/library/core/src/iter/traits/iterator.rs b/library/core/src/iter/traits/iterator.rs
@@ -762,6 +762,7 @@ pub trait Iterator {
     /// assert_eq!(iter.next(), None);
     /// ```
     ///
+    /// [`Option<T>`]: Option
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>
