diff --git a/Doc/library/selectors.rst b/Doc/library/selectors.rst
index 5acd0c28184..a6df909364b 100644
--- a/Doc/library/selectors.rst
+++ b/Doc/library/selectors.rst
@@ -214,29 +214,29 @@ Examples of selector usage::
 
    >>> import selectors
    >>> import socket
-   >>> 
+   >>>
    >>> s = selectors.DefaultSelector()
    >>> r, w = socket.socketpair()
-   >>> 
+   >>>
    >>> r.setblocking(False)
    >>> w.setblocking(False)
-   >>> 
+   >>>
    >>> s.register(r, selectors.EVENT_READ)
    SelectorKey(fileobj=<socket.socket fd=4, family=AddressFamily.AF_UNIX, type=2049, proto=0>, fd=4, events=1, data=None)
    >>> s.register(w, selectors.EVENT_WRITE)
    SelectorKey(fileobj=<socket.socket fd=5, family=AddressFamily.AF_UNIX, type=2049, proto=0>, fd=5, events=2, data=None)
-   >>> 
+   >>>
    >>> print(s.select())
    [(SelectorKey(fileobj=<socket.socket fd=5, family=AddressFamily.AF_UNIX, type=2049, proto=0>, fd=5, events=2, data=None), 2)]
-   >>> 
+   >>>
    >>> for key, events in s.select():
    ...     if events & selectors.EVENT_WRITE:
    ...         key.fileobj.send(b'spam')
-   ... 
+   ...
    4
    >>> for key, events in s.select():
    ...     if events & selectors.EVENT_READ:
    ...         print(key.fileobj.recv(1024))
-   ... 
+   ...
    b'spam'
    >>> s.close()