improve example in update-code-from-shorthand

instructions/update-code-from-shorthand.instructions.md

@@ -94,7 +94,9 @@ solution for the goal.
 ```bash
 [user prompt]
 UPDATE CODE FROM SHORTHAND 
-script.js
+#file:script.js 
+Use #file:index.html:94-99 to see where converted
+markdown to html will be parsed `id="a"`.
 ```
 
 ### Code File
@@ -108,8 +110,18 @@ var xhttp = new XMLHttpRequest();
 xhttp.onreadystatechange = function() {
  if (this.readyState == 4 && this.status == 200) {
   let data = this.responseText;
+  let a = document.getElementById("a");
+  let output = "";
   // start-shorthand
-  ()=> apply_html_to_parsed_markdown(data);
+  ()=> let apply_html_to_parsed_markdown = (md) => {
+   ()=> md.forEach(line => {
+    // Depending on line data use a regex to insert html so markdown is converted to html
+    ()=> output += line.replace(/^(regex to add html elements from markdonw line)(.*)$/g, $1$1);
+   });
+   // Output the converted file from markdown to html.
+   return output;
+  };
+  ()=>a.innerHTML = apply_html_to_parsed_markdown(data);
   // end-shorthand
  }
 };