Remove trailing whitespace.
diff --git a/Doc/distutils/setupscript.rst b/Doc/distutils/setupscript.rst
index 7a6be8b..666b7d6 100644
--- a/Doc/distutils/setupscript.rst
+++ b/Doc/distutils/setupscript.rst
@@ -213,7 +213,7 @@
 this::
 
    setup(...,
-         ext_modules=[Extension('_foo', ['foo.i'], 
+         ext_modules=[Extension('_foo', ['foo.i'],
                                 swig_opts=['-modern', '-I../include'])],
          py_modules=['foo'],
         )