Remove trailing whitespace.
diff --git a/Doc/library/tkinter.rst b/Doc/library/tkinter.rst
index b40affa..55cc668 100644
--- a/Doc/library/tkinter.rst
+++ b/Doc/library/tkinter.rst
@@ -41,7 +41,7 @@
 linked with the Python interpreter.
 
 In addition to the Tk interface module, :mod:`tkinter` includes a number of
-Python modules, :mod:`tkinter.constants` being one of the most important. 
+Python modules, :mod:`tkinter.constants` being one of the most important.
 Importing :mod:`tkinter` will automatically import :mod:`tkinter.constants`,
 so, usually, to use Tkinter all you need is a simple import statement::
 
@@ -96,7 +96,7 @@
    Basic dialogs and convenience functions.
 
 :mod:`tkinter.dnd`
-   Drag-and-drop support for :mod:`tkinter`. This is experimental and should 
+   Drag-and-drop support for :mod:`tkinter`. This is experimental and should
    become deprecated when it is replaced  with the Tk DND.
 
 :mod:`turtle`
@@ -156,7 +156,7 @@
   the novice.  The book is not exhaustive, and for many details it defers to the
   man pages.
 
-* :file:`tkinter/__init__.py` is a last resort for most, but can be a good 
+* :file:`tkinter/__init__.py` is a last resort for most, but can be a good
   place to go when nothing else makes sense.
 
 
@@ -271,7 +271,7 @@
 someOptions), in C++, you would express this as fred.someAction(someOptions),
 and in Tk, you say::
 
-   .fred someAction someOptions 
+   .fred someAction someOptions
 
 Note that the object name, ``.fred``, starts with a dot.
 
@@ -320,7 +320,7 @@
 arguments.  In Tkinter, the Pack class holds all this functionality, and the
 various forms of the pack command are implemented as methods.  All widgets in
 :mod:`tkinter` are subclassed from the Packer, and so inherit all the packing
-methods. See the :mod:`tkinter.tix` module documentation for additional 
+methods. See the :mod:`tkinter.tix` module documentation for additional
 information on the Form geometry manager. ::
 
    pack .fred -side left       =====>  fred.pack(side = "left")
@@ -477,7 +477,7 @@
 For more extensive information on the packer and the options that it can take,
 see the man pages and page 183 of John Ousterhout's book.
 
-anchor 
+anchor
    Anchor type.  Denotes where the packer is to place each slave in its parcel.
 
 expand
@@ -707,7 +707,7 @@
 they are denoted in Tk, which can be useful when referring to the Tk man pages.
 ::
 
-   Tk      Tkinter Event Field             Tk      Tkinter Event Field 
+   Tk      Tkinter Event Field             Tk      Tkinter Event Field
    --      -------------------             --      -------------------
    %f      focus                           %A      char
    %h      height                          %E      send_event