Resolve "Java puzzle code"

Closes #104 (closed)

java-puzzles/src/test/java/fr/ippon/PlayingWithBigDecimal.java

@@ -11,8 +11,9 @@ public class PlayingWithBigDecimal {
   public void roundingSubstract() {
     BigDecimal a = new BigDecimal(2.00);
     BigDecimal b = new BigDecimal(0.99);
-  // assertThat(a.subtract(b).toString()).isEqualTo("1");
-  // assertThat(a.subtract(b).toString()).isEqualTo("1.01");
-  // assertThat(a.subtract(b).toString()).isEqualTo("1.0100000000000000088817841970012523233890533447265625");
+
+    // assertThat(a.subtract(b).toString()).isEqualTo("1");
+    // assertThat(a.subtract(b).toString()).isEqualTo("1.01");
+    assertThat(a.subtract(b).toString()).isEqualTo("1.0100000000000000088817841970012523233890533447265625");
   }
 }