[Clippy] Swap map_entry to use diagnostic items instead of paths

Author: GnomedDev

alloc/src/collections/btree/map.rs

@@ -916,6 +916,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// assert_eq!(map.contains_key(&2), false);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "btreemap_contains_key")]
     pub fn contains_key<Q: ?Sized>(&self, key: &Q) -> bool
     where
         K: Borrow<Q> + Ord,
@@ -981,6 +982,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_confusables("push", "put", "set")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "btreemap_insert")]
     pub fn insert(&mut self, key: K, value: V) -> Option<V>
     where
         K: Ord,

std/src/collections/hash/map.rs

@@ -1037,6 +1037,7 @@ where
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "hashmap_contains_key")]
     pub fn contains_key<Q: ?Sized>(&self, k: &Q) -> bool
     where
         K: Borrow<Q>,
@@ -1100,6 +1101,7 @@ where
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_confusables("push", "append", "put")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "hashmap_insert")]
     pub fn insert(&mut self, k: K, v: V) -> Option<V> {
         self.base.insert(k, v)
     }