Refactor Sudoku Solver and test to pass Build and Clang Format

Author: khalidx3

src/test/java/com/thealgorithms/backtracking/SudokuSolverTest.java

@@ -6,31 +6,21 @@
 
 public class SudokuSolverTest {
 
-      @Test
-      public void testSudokuSolverSolvesValidBoard() {
-            int[][] sudoku = {
-                        { 3, 0, 6, 5, 0, 8, 4, 0, 0 },
-                        { 5, 2, 0, 0, 0, 0, 0, 0, 0 },
-                        { 0, 8, 7, 0, 0, 0, 0, 3, 1 },
-                        { 0, 0, 3, 0, 1, 0, 0, 8, 0 },
-                        { 9, 0, 0, 8, 6, 3, 0, 0, 5 },
-                        { 0, 5, 0, 0, 9, 0, 6, 0, 0 },
-                        { 1, 3, 0, 0, 0, 0, 2, 5, 0 },
-                        { 0, 0, 0, 0, 0, 0, 0, 7, 4 },
-                        { 0, 0, 5, 2, 0, 6, 3, 0, 0 }
-            };
+    @Test
+    public void testSudokuSolverSolvesValidBoard() {
+        int[][] sudoku = {{3, 0, 6, 5, 0, 8, 4, 0, 0}, {5, 2, 0, 0, 0, 0, 0, 0, 0}, {0, 8, 7, 0, 0, 0, 0, 3, 1}, {0, 0, 3, 0, 1, 0, 0, 8, 0}, {9, 0, 0, 8, 6, 3, 0, 0, 5}, {0, 5, 0, 0, 9, 0, 6, 0, 0}, {1, 3, 0, 0, 0, 0, 2, 5, 0}, {0, 0, 0, 0, 0, 0, 0, 7, 4}, {0, 0, 5, 2, 0, 6, 3, 0, 0}};
 
-            boolean solved = SudokuSolver.sudokuSolver(sudoku, 0, 0);
-            assertTrue(solved, "SudokuSolver should solve a valid board");
-      }
+        boolean solved = SudokuSolver.sudokuSolver(sudoku, 0, 0);
+        assertTrue(solved, "SudokuSolver should solve a valid board");
+    }
 
-      @Test
-      public void testSudokuSolverRejectsInvalidBoard() {
-            int[][] sudoku = new int[9][9];
-            sudoku[0][0] = 5;
-            sudoku[0][1] = 5; // invalid duplicate in row
+    @Test
+    public void testSudokuSolverRejectsInvalidBoard() {
+        int[][] sudoku = new int[9][9];
+        sudoku[0][0] = 5;
+        sudoku[0][1] = 5; // invalid duplicate in row
 
-            boolean solved = SudokuSolver.sudokuSolver(sudoku, 0, 0);
-            assertFalse(solved, "SudokuSolver should not solve an invalid board");
-      }
+        boolean solved = SudokuSolver.sudokuSolver(sudoku, 0, 0);
+        assertFalse(solved, "SudokuSolver should not solve an invalid board");
+    }
 }