bpo-33804: Document that the argument for io.TextIOBase.read() is optional (GH-7510)
(cherry picked from commit b6bb77c2b8e83ba6cb845c7b512ac564276e854f)
Co-authored-by: Andrés Delfino <adelfino@gmail.com>
diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index f2e0fdb..98649de 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -799,7 +799,7 @@
.. versionadded:: 3.1
- .. method:: read(size)
+ .. method:: read(size=-1)
Read and return at most *size* characters from the stream as a single
:class:`str`. If *size* is negative or ``None``, reads until EOF.