Format Java files with clang-format

Author: the-yash-rajput

src/main/java/com/thealgorithms/graph/TopologicalSort.java

@@ -16,6 +16,11 @@
  */
 public class TopologicalSort {
 
+    // Prevent instantiation
+    private TopologicalSort() {
+        throw new AssertionError("Cannot instantiate utility class");
+    }
+
     /**
      * Class that represents a directed graph and provides methods for
      * manipulating the graph

src/test/java/com/thealgorithms/graph/TopologicalSortTest.java

@@ -1,12 +1,14 @@
 package com.thealgorithms.graph;
 
-import static org.junit.jupiter.api.Assertions.*;
-
 import java.util.Arrays;
 import java.util.List;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
 /**
  * Test class for TopologicalSort
  * Achieves 100% code coverage