twelve-days: inline constructVerse

exercises/twelve-days/src/example/java/TwelveDays.java

 public class TwelveDays {
-    private static String[] days = new String[] {"first", "second", "third", "fourth", "fifth", "sixth", "seventh",
-        "eighth", "ninth", "tenth", "eleventh", "twelfth"};
-    private static String[] gifts = new String[] {
+    private static String[] days = new String[]{"first", "second", "third", "fourth", "fifth", "sixth", "seventh",
+            "eighth", "ninth", "tenth", "eleventh", "twelfth"};
+    private static String[] gifts = new String[]{
             "a Partridge in a Pear Tree.",
             "two Turtle Doves, ",
             "three French Hens, ",
     };
 
     public String verse(int verseNumber) {
-        return constructVerse(verseNumber);
+        StringBuilder stringBuilder = new StringBuilder("On the " + days[verseNumber - 1]
+                + " day of Christmas my true love gave to me, ");
+        for (int i = verseNumber; i > 0; i--) {
+            if (verseNumber != 1 && i == 1) stringBuilder.append("and ");
+            stringBuilder.append(gifts[i - 1]);
+        }
+        stringBuilder.append("\n");
+        return stringBuilder.toString();
     }
 
     public String verses(int verseNumberStart, int verseNumberEnd) {
-        StringBuilder stringBuilder = new StringBuilder(constructVerse(verseNumberStart));
+        StringBuilder stringBuilder = new StringBuilder(verse(verseNumberStart));
         for (int i = verseNumberStart + 1; i <= verseNumberEnd; i++) {
             stringBuilder.append("\n");
-            stringBuilder.append(constructVerse(i));
+            stringBuilder.append(verse(i));
         }
         return stringBuilder.toString();
     }
     public String sing() {
         return verses(1, 12);
     }
-
-    private String constructVerse(int verseNumber) {
-        StringBuilder stringBuilder = new StringBuilder("On the " + days[verseNumber - 1]
-                + " day of Christmas my true love gave to me, ");
-        for (int i = verseNumber; i > 0; i--) {
-            if (verseNumber != 1 && i == 1) stringBuilder.append("and ");
-            stringBuilder.append(gifts[i - 1]);
-        }
-        stringBuilder.append("\n");
-        return stringBuilder.toString();
-    }
 }