Fix some clippy and doc lints

Author: declanvk

src/collections/map/iterators/into_iter.rs

@@ -241,15 +241,15 @@ mod tests {
             [u8::MAX, u8::MAX, u8::MAX],
         ]
         .into_iter()
-        .map(|arr| DropCounter::new(&drop_counter, arr))
+        .map(|arr| DropCounter::new(drop_counter, arr))
         .enumerate()
         .map(swap)
         .collect()
     }
 
     fn check_will_deallocate_unconsumed_iter_values(
         drop_counter: &Arc<AtomicUsize>,
-        mut iter: impl Iterator + DoubleEndedIterator + ExactSizeIterator,
+        mut iter: impl DoubleEndedIterator + ExactSizeIterator,
     ) {
         assert_eq!(drop_counter.load(Ordering::Relaxed), 8);
 

src/collections/map/iterators/range.rs

@@ -1,5 +1,5 @@
 //! This module contains types and functions relating to iterating over a
-//! range of the [`TreeMap`][crate::TreeMap].
+//! range of the [`TreeMap`].
 
 use std::{
     cmp::Ordering,

src/nodes/representation.rs

@@ -273,13 +273,7 @@ impl<K, V, const PREFIX_LEN: usize> Copy for ConcreteNodePtr<K, V, PREFIX_LEN> {
 
 impl<K, V, const PREFIX_LEN: usize> Clone for ConcreteNodePtr<K, V, PREFIX_LEN> {
     fn clone(&self) -> Self {
-        match self {
-            Self::Node4(arg0) => Self::Node4(arg0.clone()),
-            Self::Node16(arg0) => Self::Node16(arg0.clone()),
-            Self::Node48(arg0) => Self::Node48(arg0.clone()),
-            Self::Node256(arg0) => Self::Node256(arg0.clone()),
-            Self::LeafNode(arg0) => Self::LeafNode(arg0.clone()),
-        }
+        *self
     }
 }
 
@@ -341,12 +335,7 @@ impl<K, V, const PREFIX_LEN: usize> Copy for ConcreteInnerNodePtr<K, V, PREFIX_L
 
 impl<K, V, const PREFIX_LEN: usize> Clone for ConcreteInnerNodePtr<K, V, PREFIX_LEN> {
     fn clone(&self) -> Self {
-        match self {
-            Self::Node4(arg0) => Self::Node4(arg0.clone()),
-            Self::Node16(arg0) => Self::Node16(arg0.clone()),
-            Self::Node48(arg0) => Self::Node48(arg0.clone()),
-            Self::Node256(arg0) => Self::Node256(arg0.clone()),
-        }
+        *self
     }
 }