fix: Format code to comply with clang-format and checkstyle requirements

Author: saikirankanakala

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

@@ -158,14 +158,14 @@ void testPathGraph() {
     @Test
     void testInvalidEmptyTree() {
         assertThrows(IllegalArgumentException.class, () -> {
-            CentroidDecomposition.buildFromEdges(0, new int[][]{});
+            CentroidDecomposition.buildFromEdges(0, new int[][] {});
         });
     }
 
     @Test
     void testInvalidNegativeNodes() {
         assertThrows(IllegalArgumentException.class, () -> {
-            CentroidDecomposition.buildFromEdges(-1, new int[][]{});
+            CentroidDecomposition.buildFromEdges(-1, new int[][] {});
         });
     }