[2.7] bpo-33804: Document that the argument for io.TextIOBase.read() is optional...

(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 300041dc3bb176b40d7dc084cb218ed7688cab20..dcdd01cd0aa5db86729c158fe1d0851cc8ea4f45 100644 (file)
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -724,7 +724,7 @@ Text I/O
 
       .. versionadded:: 2.7
 
-   .. method:: read(n)
+   .. method:: read(n=-1)
 
       Read and return at most *n* characters from the stream as a single
       :class:`unicode`.  If *n* is negative or ``None``, reads until EOF.