gh-83926: BlockingIOError characters_written is byte count (#141215)

diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst
index b5e3a84b4556dd828d0e6c78a63af7f5aae5c658..f3aca1ba49257b74a8ff296a550a47fb34e4ac15 100644 (file)
--- a/Doc/library/exceptions.rst
+++ b/Doc/library/exceptions.rst
@@ -742,8 +742,8 @@ depending on the system error code.
 
    .. attribute:: characters_written
 
-      An integer containing the number of characters written to the stream
-      before it blocked.  This attribute is available when using the
+      An integer containing the number of **bytes** written to the stream
+      before it blocked. This attribute is available when using the
       buffered I/O classes from the :mod:`io` module.
 
 .. exception:: ChildProcessError