Remove trailing whitespace.
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 3200ed8..57fd63b 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1152,7 +1152,7 @@
    implementing :meth:`__format__`, however most classes will either
    delegate formatting to one of the built-in types, or use a similar
    formatting option syntax.
-   
+
    See :ref:`formatspec` for a description of the standard formatting syntax.
 
    The return value must be a string object.