bpo-31824: Document default value of 'errors' parameters (GH-4328)
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index b9c1868..6e249ec 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -802,7 +802,7 @@
:func:`lookup` function to construct the instance.
-.. class:: StreamReaderWriter(stream, Reader, Writer, errors)
+.. class:: StreamReaderWriter(stream, Reader, Writer, errors='strict')
Creates a :class:`StreamReaderWriter` instance. *stream* must be a file-like
object. *Reader* and *Writer* must be factory functions or classes providing the
@@ -826,7 +826,7 @@
:func:`lookup` function to construct the instance.
-.. class:: StreamRecoder(stream, encode, decode, Reader, Writer, errors)
+.. class:: StreamRecoder(stream, encode, decode, Reader, Writer, errors='strict')
Creates a :class:`StreamRecoder` instance which implements a two-way conversion:
*encode* and *decode* work on the frontend — the data visible to