Quote identifiers in linked_list.rs

Author: balt-dev

library/alloc/src/collections/linked_list.rs

@@ -864,7 +864,7 @@ impl<T, A: Allocator> LinkedList<T, A> {
     /// assert_eq!(dl.front().unwrap(), &6);
     /// ```
     #[unstable(feature = "push_mut", issue = "135974")]
-    #[must_use = "if you don't need a reference to the value, use LinkedList::push_front instead"]
+    #[must_use = "if you don't need a reference to the value, use `LinkedList::push_front` instead"]
     pub fn push_front_mut(&mut self, elt: T) -> &mut T {
         let node = Box::new_in(Node::new(elt), &self.alloc);
         let mut node_ptr = NonNull::from(Box::leak(node));
@@ -936,7 +936,7 @@ impl<T, A: Allocator> LinkedList<T, A> {
     /// assert_eq!(dl.back().unwrap(), &6);
     /// ```
     #[unstable(feature = "push_mut", issue = "135974")]
-    #[must_use = "if you don't need a reference to the value, use LinkedList::push_back instead"]
+    #[must_use = "if you don't need a reference to the value, use `LinkedList::push_back` instead"]
     pub fn push_back_mut(&mut self, elt: T) -> &mut T {
         let node = Box::new_in(Node::new(elt), &self.alloc);
         let mut node_ptr = NonNull::from(Box::leak(node));