Fix Python Docstring to include all Args.

Author: jbampton

test/functional/test_framework/util.py

@@ -244,14 +244,15 @@ class PortSeed:
     # Must be initialized with a unique integer for each process
     n = None
 
-def get_rpc_proxy(url, node_number, timeout=None, coveragedir=None):
+def get_rpc_proxy(url, node_number, *, timeout=None, coveragedir=None):
     """
     Args:
         url (str): URL of the RPC server to call
         node_number (int): the node number (or id) that this calls to
 
     Kwargs:
         timeout (int): HTTP timeout in seconds
+        coveragedir (str): Directory
 
     Returns:
         AuthServiceProxy. convenience object for making RPC calls.