Rename utf8b error handler to surrogateescape.
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 83f5ee9..2213740 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -64,8 +64,8 @@
.. versionchanged:: 3.1
On some systems, conversion using the file system encoding may
- fail. In this case, Python uses the ``utf8b`` encoding error
- handler, which means that undecodable bytes are replaced by a
+ fail. In this case, Python uses the ``surrogateescape`` encoding
+ error handler, which means that undecodable bytes are replaced by a
Unicode character U+DCxx on decoding, and these are again
translated to the original byte on encoding.