Update app.py

app.py

@@ -11,15 +11,15 @@ static_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)))
 
 @app.route('/css')
 def css():
-    return send_from_directory(os.path.join(static_dir, 'css')
+    return send_from_directory(os.path.join(static_dir, 'css'))
 
 @app.route('/js')
 def js():
-    return send_from_directory(os.path.join(static_dir, 'js')
+    return send_from_directory(os.path.join(static_dir, 'js'))
 
 @app.route('/img')
 def img():
-    return send_from_directory(os.path.join(static_dir, 'img')                               
+    return send_from_directory(os.path.join(static_dir, 'img'))
 
 @app.route('/')
 def index():