Fix doc formatting

futures-util/src/stream/diff_ascending.rs

@@ -36,7 +36,7 @@ pub fn diff_ascending<T: Ord, St1: Stream<Item = T>, St2: Stream<Item = T>>(
 }
 
 pin_project! {
-    /// Struct for the `diff_ascending` method.
+    /// Struct for the [`diff_ascending`] method.
     #[derive(Debug)]
     #[must_use = "streams do nothing unless polled"]
     pub struct DiffAscending<T, St1: Stream<Item = T>, St2: Stream<Item = T>> {

futures-util/src/stream/merge_ascending.rs

@@ -27,7 +27,7 @@ pub fn merge_ascending<T: Ord, St1: Stream<Item = T>, St2: Stream<Item = T>>(
 }
 
 pin_project! {
-    /// Struct for the `merge_ascending` method.
+    /// Struct for the [`merge_ascending`] method.
     #[derive(Debug)]
     #[must_use = "streams do nothing unless polled"]
     pub struct MergeAscending<T, St1: Stream<Item = T>, St2: Stream<Item = T>> {

futures-util/src/stream/merge_multiple_ascending.rs

@@ -20,7 +20,7 @@ use pin_project_lite::pin_project;
 /// # });
 /// ```
 ///
-/// NOTE: this is not as easy to use as `merge_ascending`. Every stream in the
+/// NOTE: this is not as easy to use as [`merge_ascending`](futures::stream::merge_asceding). Every stream in the
 /// iterator must be `Unpin` and have _exactly_ the same type as opposed to the
 /// two stream case where both streams need only implement the `Stream<Item =
 /// T>` trait. In practice, you will likely need to Box your streams into a