添加程序的标识和说明

java-numbers/src/test/java/com/ossez/maths/BigDecimalDemoUnitTest.java

@@ -172,6 +172,9 @@ public class BigDecimalDemoUnitTest {
         logger.info("{}", numberStr);
     }
 
+    /**
+     * To String with ScientificNotation
+     */
     @Test
     public void bigDecimalScientificNotation() {
         // Create a BigDecimal object