Add the "christmas-trees" hole

Updates #3

Author: JRaspass

routes/answers.go

@@ -300,6 +300,61 @@ Take one down and pass it around, no more bottles of beer on the wall.
 
 No more bottles of beer on the wall, no more bottles of beer.
 Go to the store and buy some more, 99 bottles of beer on the wall.`,
+	"christmas-trees": `   *
+  ***
+ *****
+   *
+
+    *
+   ***
+  *****
+ *******
+    *
+
+     *
+    ***
+   *****
+  *******
+ *********
+     *
+
+      *
+     ***
+    *****
+   *******
+  *********
+ ***********
+      *
+
+       *
+      ***
+     *****
+    *******
+   *********
+  ***********
+ *************
+       *
+
+        *
+       ***
+      *****
+     *******
+    *********
+   ***********
+  *************
+ ***************
+        *
+
+         *
+        ***
+       *****
+      *******
+     *********
+    ***********
+   *************
+  ***************
+ *****************
+         *`,
 	"emirp-numbers": `13
 17
 31

routes/hole.go

@@ -10,6 +10,19 @@ import (
 var preambles = map[string]string{
 	"99-bottles-of-beer": `<h1>99 Bottles of Beer</h1><p>Print the lyrics to the song 99 Bottles of Beer.</p>`,
 	"arabic-to-roman":    `<h1>Arabic to Roman</h1><p>For each arabic numeral argument print the same number in roman numerals.</p>`,
+	"christmas-trees": `<h1>Christmas Trees</h1><p>Print a size ascending range of Christmas trees using asterisks, ranging from size <b>3</b> to size <b>9</b>, each tree separated by a blank line.<p>A size <b>3</b> tree should look like this, with a single centered asterisk for the trunk:<pre>   *
+  ***
+ *****
+   *</pre><p>With the largest size <b>9</b> tree looking like this:<pre>         *
+        ***
+       *****
+      *******
+     *********
+    ***********
+   *************
+  ***************
+ *****************
+         *</pre>`,
 	"emirp-numbers":      `<h1>Emirp Numbers</h1><p>An emirp (prime spelled backwards) is a prime number that results in a different prime when its decimal digits are reversed. For example both <b>13</b> and <b>31</b> are emirps.</p><p>Print all the emirp numbers from <b>1</b> to <b>1000</b> inclusive, each on their own line.</p>`,
 	"evil-numbers":       `<h1>Evil Numbers</h1><p>An evil number is a non-negative number that has an even number of 1s in its binary expansion.<p>Print all the evil numbers from <b>0</b> to <b>50</b> inclusive, each on their own line.<p>Numbers that are not evil are called <a href=odious-numbers>odious numbers</a>.</p>`,
 	"fibonacci":          `<h1>Fibonacci</h1><p>Print the first <b>31</b> Fibonacci numbers from <b>F<sub>0</sub> = 0</b> to <b>F<sub>30</sub> = 832040</b> (inclusive), each on a separate line.</p>`,

routes/home.go

@@ -64,16 +64,17 @@ func home(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
 		         WHEN 'prime-numbers'       THEN 8
 		         WHEN 'quine'               THEN 9
 		         WHEN '99-bottles-of-beer'  THEN 10
-		         WHEN 'pangram-grep'        THEN 11
-		         WHEN 'seven-segment'       THEN 12
-		         WHEN 'sierpiński-triangle' THEN 13
-		         WHEN 'π'                   THEN 14
-		         WHEN 'φ'                   THEN 15
-		         WHEN '𝑒'                   THEN 16
-		         WHEN 'τ'                   THEN 17
-		         WHEN 'arabic-to-roman'     THEN 18
-		         WHEN 'roman-to-arabic'     THEN 19
-		         WHEN 'spelling-numbers'    THEN 20
+		         WHEN 'christmas-trees'     THEN 11
+		         WHEN 'pangram-grep'        THEN 12
+		         WHEN 'seven-segment'       THEN 13
+		         WHEN 'sierpiński-triangle' THEN 14
+		         WHEN 'π'                   THEN 15
+		         WHEN 'φ'                   THEN 16
+		         WHEN '𝑒'                   THEN 17
+		         WHEN 'τ'                   THEN 18
+		         WHEN 'arabic-to-roman'     THEN 19
+		         WHEN 'roman-to-arabic'     THEN 20
+		         WHEN 'spelling-numbers'    THEN 21
 		         END, row_number`,
 		printHeader(w, r, 200),
 	)
@@ -133,6 +134,8 @@ func home(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
 				w.Write([]byte(`Medium><a href=99-bottles-of-beer>99 Bottles of Beer`))
 			case "arabic-to-roman":
 				w.Write([]byte(`Slow><a href=arabic-to-roman>Arabic to Roman`))
+			case "christmas-trees":
+				w.Write([]byte(`Medium><a href=christmas-trees>Christmas Trees`))
 			case "emirp-numbers":
 				w.Write([]byte(`Fast><a href=emirp-numbers>Emirp Numbers`))
 			case "evil-numbers":

routes/scores.go

@@ -12,6 +12,7 @@ var holes = [][]string{
 	{"all", "All Holes"},
 	{"99-bottles-of-beer", "99 Bottles of Beer"},
 	{"arabic-to-roman", "Arabic to Roman"},
+	{"christmas-trees", "Christmas Trees"},
 	{"emirp-numbers", "Emirp Numbers"},
 	{"evil-numbers", "Evil Numbers"},
 	{"fibonacci", "Fibonacci"},