clippy fix and DIRECTORY.md

Author: donjuanplatinum

DIRECTORY.md

@@ -298,6 +298,7 @@
     * [Insertion Sort](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/insertion_sort.rs)
     * [Intro Sort](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/intro_sort.rs)
     * [Merge Sort](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/merge_sort.rs)
+	* [Merge Sort Inplace](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/merge_sort_inplace.rs)
     * [Odd Even Sort](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/odd_even_sort.rs)
     * [Pancake Sort](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/pancake_sort.rs)
     * [Patience Sort](https://github.com/TheAlgorithms/Rust/blob/master/src/sorting/patience_sort.rs)

src/sorting/merge_sort_inplace.rs

@@ -4,11 +4,11 @@ fn merge<T: Ord>(array: &mut [T], mid: usize) {
     let mut right = mid;
 
     while left < right && right < len {
-        if &array[left] < &array[right] {
+        if array[left] < array[right] {
             left += 1;
         } else {
             let tmp = right;
-            while right < len && &array[left] > &array[right] {
+            while right < len && array[left] > array[right] {
                 right += 1;
             }
             let rotate_mid = tmp - left;