Move deepcopy fix to Reddit class

CHANGES.rst

@@ -6,6 +6,12 @@ Async PRAW follows `semantic versioning <http://semver.org/>`_.
 Unreleased
 ----------
 
+**Changed**
+
+- :class:`.Reddit` will now be shallow copied when a deepcopy is preformed on it as
+  ``asyncprawcore.Session`` (more specifically, :py:class:`asyncio.AbstractEventLoop`)
+  does not support being deepcopied.
+
 **Fixed**
 
 - Fixed an issue where some :class:`.RedditBase` objects would be sent in a request as

asyncpraw/reddit.py

@@ -3,6 +3,7 @@
 import configparser
 import os
 import re
+from copy import copy
 from itertools import islice
 from logging import getLogger
 from typing import (
@@ -144,6 +145,15 @@ async def __aexit__(self, *_args):
         """Handle the context manager close."""
         await self.close()
 
+    def __deepcopy__(self, memodict={}):
+        """Shallow copy on deepcopy.
+
+        A shallow copied is performed on deepcopy as
+        :py:class:`asyncio.AbstractEventLoop` cannot be deepcopied.
+
+        """
+        return copy(self)
+
     def __enter__(self):
         """Handle the context manager open.