Update codecs.py to CPython 3.10

Lib/codecs.py

@@ -83,7 +83,7 @@ BOM64_BE = BOM_UTF32_BE
 class CodecInfo(tuple):
     """Codec details when looking up the codec registry"""
 
-    # Private API to allow Python 3.4 to blacklist the known non-Unicode
+    # Private API to allow Python 3.4 to denylist the known non-Unicode
     # codecs in the standard library. A more general mechanism to
     # reliably distinguish test encodings from other codecs will hopefully
     # be defined for Python 3.5
@@ -386,7 +386,7 @@ class StreamWriter(Codec):
 
     def reset(self):
 
-        """ Flushes and resets the codec buffers used for keeping state.
+        """ Resets the codec buffers used for keeping internal state.
 
             Calling this method should ensure that the data on the
             output is put into a clean state, that allows appending
@@ -620,7 +620,7 @@ class StreamReader(Codec):
 
     def reset(self):
 
-        """ Resets the codec buffers used for keeping state.
+        """ Resets the codec buffers used for keeping internal state.
 
             Note that no stream repositioning should take place.
             This method is primarily intended to be able to recover