updated pretty Display and added BSTRecursiveGenericTest.java

Author: Krishnan M

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

@@ -7,7 +7,6 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-
 /**
  * Unit tests for BSTRecursiveGeneric class.
  * Covers insertion, deletion, search, traversal, sorting, and display.