Fixed merge sort listing on README

Author: marioplumbarius

README.md

@@ -35,8 +35,8 @@ gradle clean assemble
 - [Insertion Sort](https://github.com/marioluan/java-sorting-algorithms/blob/master/src/main/java/io/github/marioluan/algorithms/sorting/InsertionSort.java)
 - [Selection Sort](https://github.com/marioluan/java-sorting-algorithms/blob/master/src/main/java/io/github/marioluan/algorithms/sorting/SelectionSort.java)
 - [Shellsort](https://github.com/marioluan/java-sorting-algorithms/blob/master/src/main/java/io/github/marioluan/algorithms/sorting/ShellSort.java)
-- Merge Sort
--- [Recursive](https://github.com/marioluan/java-sorting-algorithms/blob/master/src/main/java/io/github/marioluan/algorithms/sorting/MergeSortRecursive.java)
+- Merge Sort  
+-- [Recursive](https://github.com/marioluan/java-sorting-algorithms/blob/master/src/main/java/io/github/marioluan/algorithms/sorting/MergeSortRecursive.java)  
 -- [Iterative](https://github.com/marioluan/java-sorting-algorithms/blob/master/src/main/java/io/github/marioluan/algorithms/sorting/MergeSortIterative.java)
 
 ## References