Fix HTMLOptionElement Option() constructor example (mdn#40677)

* fix: use correct option values

* refactor: separate HTML and JS code blocks

* chore: adjust comment formatting

* Update index.md

---------

Co-authored-by: Joshua Chen <sidachen2003@gmail.com>

Author: adi-ray

files/en-us/web/api/htmloptionelement/option/index.md

@@ -65,15 +65,11 @@ options.forEach((element, key) => {
 
 ### Append options with different parameters
 
-```js
-/* assuming we have the following HTML
-<select id="s">
-    <option>First</option>
-    <option>Second</option>
-    <option>Third</option>
-</select>
-*/
+```html
+<select id="s"></select>
+```
 
+```js
 const s = document.getElementById("s");
 const options = ["zero", "one", "two"];
 
@@ -85,17 +81,20 @@ options.forEach((element, key) => {
     s[key] = new Option(element, s.options.length, true, false); // Will add the "selected" attribute
   }
   if (element === "two") {
-    s[key] = new Option(element, s.options.length, false, true); // Just will be selected in "view"
+    s[key] = new Option(element, s.options.length, false, true); // Will actually be selected in the view
   }
 });
+```
 
-/* Result
+Result:
+
+```html
 <select id="s">
   <option value="0">zero</option>
-  <option value="1" selected="">one</option>
-  <option value="2">two</option> // User will see this as 'selected'
+  <option value="1" selected>one</option>
+  <option value="2">two</option>
+  <!-- User will see two as 'selected' -->
 </select>
-*/
 ```
 
 ## Specifications