Fix code formatting according to Clang-format

Author: Ayush41

src/main/java/com/thealgorithms/recursion/Factorial.java

@@ -20,15 +20,15 @@ private Factorial() {
    * @return factorial of n
    * @throws IllegalArgumentException if n is negative
    */
-
-  public static long factorial(int n) {
+  
+   public static long factorial(int n) {
     if (n < 0) {
       throw new IllegalArgumentException("Factorial is not defined for negative numbers.");
     }
+
     if (n == 0 || n == 1) {
       return 1;
     }
     return n * factorial(n - 1);
   }
 }
-

src/test/java/com/thealgorithms/recursion/FactorialTest.java

@@ -6,31 +6,30 @@
 import org.junit.jupiter.api.Test;
 
 public class FactorialTest {
-  @Test
-  public void testFactorialOfZero() {
-    assertEquals(1, Factorial.factorial(0));
-  }
-
-  @Test
-  public void testFactorialOfOne() {
-    assertEquals(1, Factorial.factorial(1));
+    @Test
+    public void testFactorialOfZero() {
+        assertEquals(1, Factorial.factorial(0));
+    }
+    
+    @Test
+    public void testFactorialOfOne() {
+        assertEquals(1, Factorial.factorial(1));
   }
-
+  
   @Test
   public void testFactorialOfPositiveNumbers() {
     assertEquals(120, Factorial.factorial(5));
     assertEquals(720, Factorial.factorial(6));
     assertEquals(5040, Factorial.factorial(7));
   }
-
+  
   @Test
   public void testFactorialOfTen() {
     assertEquals(3628800, Factorial.factorial(10));
   }
-
+  
   @Test
   public void testNegativeNumberThrowsException() {
     assertThrows(IllegalArgumentException.class, () -> Factorial.factorial(-1));
   }
 }
-