Improve the statement of intent when building relational keys

Author: Touchstone64

plexapi/mixins/tv_parent_child.py

@@ -4,21 +4,21 @@
 class TvParentChildMixin:
     """ Mixin for Plex objects that have parent/child relationships (episode/season/show). """
 
-    def _buildRelationalKey(self, key, **kwargs):
+    def _buildRelationalKey(self, key, **key_params):
         """ Returns a key suitable for fetching parent/child TV items
 
             Parameters:
                 key (str): The relational key to be fetched.
-                **kwargs (dict): Optional relational selection parameters to apply to the
-                    key, for example 'excludeAllLeaves=1'. Additional options (such as XML
-                    filters) should be passed into search functions. See :func:`~plexapi.base.PlexObject.fetchItems`
+                **key_params (dict): Optional query parameters to add to the key, such as
+                    'excludeAllLeaves=1' or 'index=0'. Additional XML filters should instead
+                    be passed into search functions. See :func:`~plexapi.base.PlexObject.fetchItems`
                     for details.
 
         """
         if not key:
             return None
 
-        args = {'includeGuids': 1, **kwargs}
+        args = {'includeGuids': 1, **key_params}
         params = utils.joinArgs(args).lstrip('?')
 
         return f"{key}?{params}"