Fixed #26646 -- Added IOBase methods required by TextIOWrapper to File.

Thanks Tim for the review.

docs/ref/files/file.txt

@@ -92,8 +92,13 @@ The ``File`` class
     the following attributes and methods of its ``file`` object:
     ``encoding``, ``fileno``, ``flush``, ``isatty``, ``newlines``,
     ``read``, ``readinto``, ``readlines``, ``seek``, ``softspace``, ``tell``,
-    ``truncate``, ``writelines``, ``xreadlines``. If you are using
-    Python 3, the ``seekable`` method is also available.
+    ``truncate``, ``writelines``, ``xreadlines``, ``readable()``,
+    ``writable()``, and ``seekable()``.
+
+    .. versionchanged:: 1.11
+
+        The ``readable()`` and ``writable()`` methods were added and the
+        ``seekable()`` method was made available on Python 2.
 
 .. currentmodule:: django.core.files.base
 

docs/releases/1.11.txt

@@ -122,7 +122,9 @@ Email
 File Storage
 ~~~~~~~~~~~~
 
-* ...
+* To make it wrappable by :class:`io.TextIOWrapper`,
+  :class:`~django.core.files.File` now has the ``readable()``, ``writable()``,
+  and ``seekable()`` methods.
 
 File Uploads
 ~~~~~~~~~~~~

docs/spelling_wordlist

@@ -972,6 +972,7 @@ wordcount
 wordwrap
 workflow
 worksforme
+wrappable
 wsgi
 www
 xe