prepare_kwargs: reference kwargs do not need to return

ate/client.py

@@ -12,15 +12,13 @@ from requests.exceptions import (InvalidSchema, InvalidURL, MissingSchema,
 absolute_http_url_regexp = re.compile(r"^https?://", re.I)
 
 
-def process_kwargs(method, **kwargs):
+def prepare_kwargs(method, kwargs):
     if method == "POST":
         # if request content-type is application/json, request data should be dumped
         content_type = kwargs.get("headers", {}).get("content-type", "")
         if content_type.startswith("application/json") and "data" in kwargs:
             kwargs["data"] = json.dumps(kwargs["data"])
 
-    return kwargs
-
 
 class ApiResponse(Response):
 
@@ -152,7 +150,7 @@ class HttpSession(requests.Session):
         Safe mode has been removed from requests 1.x.
         """
         try:
-            kwargs = process_kwargs(method, **kwargs)
+            prepare_kwargs(method, kwargs)
             return requests.Session.request(self, method, url, **kwargs)
         except (MissingSchema, InvalidSchema, InvalidURL):
             raise