pascals-triangle: add hint to @Ignore annotations

exercises/pascals-triangle/src/test/java/PascalsTriangleGeneratorTest.java

@@ -30,7 +30,7 @@ public class PascalsTriangleGeneratorTest {
         assertArrayEquals(expectedOutput, pascalsTriangleGenerator.generateTriangle(0));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testTriangleWithOneRow() {
         int[][] expectedOutput = new int[][]{
@@ -40,7 +40,7 @@ public class PascalsTriangleGeneratorTest {
         assertArrayEquals(expectedOutput, pascalsTriangleGenerator.generateTriangle(1));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testTriangleWithTwoRows() {
         int[][] expectedOutput = new int[][]{
@@ -51,7 +51,7 @@ public class PascalsTriangleGeneratorTest {
         assertArrayEquals(expectedOutput, pascalsTriangleGenerator.generateTriangle(2));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testTriangleWithThreeRows() {
         int[][] expectedOutput = new int[][]{
@@ -63,7 +63,7 @@ public class PascalsTriangleGeneratorTest {
         assertArrayEquals(expectedOutput, pascalsTriangleGenerator.generateTriangle(3));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testTriangleWithFourRows() {
         int[][] expectedOutput = new int[][]{
@@ -76,7 +76,7 @@ public class PascalsTriangleGeneratorTest {
         assertArrayEquals(expectedOutput, pascalsTriangleGenerator.generateTriangle(4));
     }
 
-    @Ignore
+    @Ignore("Remove to run test")
     @Test
     public void testValidatesNotNegativeRows() {
         thrown.expect(IllegalArgumentException.class);