Remove semi colon (!)

Large-app-how-to.md

@@ -257,7 +257,7 @@ This decorator is checking that g.user has a value assigned to it, otherwise it
       """
       g.user = None
       if 'user_id' in session:
-        g.user = User.query.get(session['user_id']);
+        g.user = User.query.get(session['user_id'])
 
     @mod.route('/login/', methods=['GET', 'POST'])
     def login():