Remove trailing whitespace.
diff --git a/Doc/library/traceback.rst b/Doc/library/traceback.rst
index d446339..1260037 100644
--- a/Doc/library/traceback.rst
+++ b/Doc/library/traceback.rst
@@ -169,10 +169,10 @@
 
    def lumberjack():
        bright_side_of_death()
-   
+
    def bright_side_of_death():
        return tuple()[0]
-   
+
    try:
        lumberjack()
    except:
@@ -251,12 +251,12 @@
    >>> import traceback
    >>> def another_function():
    ...     lumberstack()
-   ... 
+   ...
    >>> def lumberstack():
    ...     traceback.print_stack()
    ...     print repr(traceback.extract_stack())
    ...     print repr(traceback.format_stack())
-   ... 
+   ...
    >>> another_function()
      File "<doctest>", line 10, in <module>
        another_function()