updated pretty Display and added BSTRecursiveGenericTest.java

Author: Krishnan M

src/test/java/com/thealgorithms/datastructures/trees/BSTRecursiveGenericTest.java

@@ -1,9 +1,7 @@
 package com.thealgorithms.datastructures.trees;
 
 import static org.junit.jupiter.api.Assertions.*;
-
 import java.util.List;
-
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;