Doc: fcntl.lockf() is more powerful than written (GH-6750)
diff --git a/Doc/library/fcntl.rst b/Doc/library/fcntl.rst
index 6a66f5b..da39c31 100644
--- a/Doc/library/fcntl.rst
+++ b/Doc/library/fcntl.rst
@@ -124,7 +124,8 @@
.. function:: lockf(fd, cmd, len=0, start=0, whence=0)
This is essentially a wrapper around the :func:`~fcntl.fcntl` locking calls.
- *fd* is the file descriptor of the file to lock or unlock, and *cmd*
+ *fd* is the file descriptor (file objects providing a :meth:`~io.IOBase.fileno`
+ method are accepted as well) of the file to lock or unlock, and *cmd*
is one of the following values:
* :const:`LOCK_UN` -- unlock
@@ -175,4 +176,3 @@
present in the :mod:`os` module (on BSD only), the :func:`os.open`
function provides an alternative to the :func:`lockf` and :func:`flock`
functions.
-