update page structures

pages/Math4111/Math4111_L1.md

@@ -1,8 +1,8 @@
 # Lecture 1
 
-## Introduction 
+## Introduction
 
-Reading is not recommended before class, it;s hard.
+Reading is not recommended before class, it's hard.
 
 ## Chapter 1: The real number and complex number systems
 

pages/Math4111/_meta.js

@@ -1,6 +1,7 @@
 export default {
-    index: {
-        display: 'hidden'
+    index: "Course Description",
+    "---":{
+        type: 'separator'
     },
     Exam_reviews: "Exam reviews",
     Math4111_L1: "Lecture 1",