Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index 08d35d8..7763965 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -884,7 +884,7 @@
 
 def MakeProxyType(name, exposed, _cache={}):
     '''
-    Return an proxy type whose methods are given by `exposed`
+    Return a proxy type whose methods are given by `exposed`
     '''
     exposed = tuple(exposed)
     try: