Update slides/part1.md

slides/part1.md

@@ -632,9 +632,7 @@ each time you add a new item to your shopping list.
 While this is very easy, there are a number of problems:
 
 * Size limit - the maximum length of a url is 2048 characters in Internet Explorer 
-
 * Privacy - Every internet server through which your request is managed can see what's in your shopping basket.
-
 * Theft - You can add things to your basket just by modifying the url.
 
 The solution to these problems is based the concepts of 'cookie' and 'session'.
@@ -644,7 +642,6 @@ The solution to these problems is based the concepts of 'cookie' and 'session'.
 <b>cookie</b>) is generated by the web server and is included in the HTTP 
 response header. On subsequent calls to this website, 
 your browser will send this cookie in the HTTP request header.
-
 * On receiving the user's cookie, the server uses it to retrieve any
 data it has stored in relation to this user. The continuity of visits
 to a website by a user, brought about by this data is referred