Remove trailing whitespace.
diff --git a/Doc/tutorial/stdlib.rst b/Doc/tutorial/stdlib.rst
index 3b1f1fc..ebb5233 100644
--- a/Doc/tutorial/stdlib.rst
+++ b/Doc/tutorial/stdlib.rst
@@ -136,7 +136,7 @@
    >>> random.random()    # random float
    0.17970987693706186
    >>> random.randrange(6)    # random integer chosen from range(6)
-   4   
+   4
 
 The SciPy project <http://scipy.org> has many other modules for numerical
 computations.