Fix comment [ci skip]

Author: blueyed

opbeat/contrib/django/client.py

@@ -107,7 +107,10 @@ def get_data_from_request(self, request):
         if request.method != 'GET':
             try:
                 try:
-                    # Django 1.4+
+                    # Django 1.5+
+                    # NOTE: on Python 2.7 `hasattr(request, 'body')` returns
+                    # False, while it might throw the exception from Django in
+                    # Python 3.
                     raw_data = request.body
                 except AttributeError:
                     raw_data = request.raw_post_data