Small fixes

AshishGapat · Apr 27, 2017 · 28a4610 · 28a4610
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diff --git a/manuscript/chapter07.md b/manuscript/chapter07.md
@@ -37,11 +37,11 @@ Imagine you want to create a list of all the movies you've seen this year.
 One solution would be to create several variables:
 
 ```js
-var movie1 = "The Wolf of Wall Street";
-var movie2 = "Zootopia";
-var movie3 = "Babysitting";
-var movie4 = "Metropolis";
-var movie5 = "Gone with the Wind";
+const movie1 = "The Wolf of Wall Street";
+const movie2 = "Zootopia";
+const movie3 = "Babysitting";
+const movie4 = "Metropolis";
+const movie5 = "Gone with the Wind";
 // ...
 ```
 

diff --git a/manuscript/chapter20.md b/manuscript/chapter20.md
@@ -16,7 +16,7 @@ Understanding the fundamentals of web development crucial for every JavaScript d
 
 * Web resources are uniquely addressed by their **URL** (Uniform resource locator). An URL is a text of the form `http://www.mywebsite.com/myresourcepath/myresource`.
 
-* In a traditional web development scenario, user actions lead to a full page reload. Another web development model, nicknamed **AJAX** (Aynchronous JavaScript and XML), uses JavaScript and **asynchronous** HTTP requests to fetch data when needed and update only the desired portions of the page. This enables the creation of web applications
+* In a traditional web development scenario, user actions on a page trigger a full reload after a synchronous request to a server. Another web development model, nicknamed **AJAX** (Aynchronous JavaScript and XML), uses JavaScript and **asynchronous** HTTP requests to fetch data when needed and update only the desired portions of the page. This enables the creation of **web applications**, aiming to offer the user experience of a native app.
 
 * Cross-domain AJAX requests are only possible if the server has been configured to accept them by setting on **cross-origin resource sharing** (CORS).
 
@@ -164,7 +164,7 @@ For security reasons, many websites have a conservative policy regarding AJAX re
 
 Enabling cross-domain requests is done by setting on **cross-origin resource sharing** (CORS) in the server configuration.
 
-> For more information about this topic, check out thi [MDN article](https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS).
+> For more information about this topic, check out this [MDN article](https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS).
 
 ## JSON, a data format for the web