Refactor PatriciaTrie constructor for clarity

Author: shimmer12

src/main/java/com/thealgorithms/datastructures/tries/PatriciaTrie.java

@@ -32,8 +32,8 @@ private static final class Node<V> {
     private int size; // number of stored keys
 
     /** Creates an empty Patricia trie. */
-    public PatriciaTrie() {}
-
+    public PatriciaTrie() {
++    }
     /**
      * Inserts or updates the value associated with {@code key}.
      *