Remove trailing whitespace.
diff --git a/Doc/library/tk.rst b/Doc/library/tk.rst
index 959cdf4..da84791 100644
--- a/Doc/library/tk.rst
+++ b/Doc/library/tk.rst
@@ -12,7 +12,7 @@
Tk/Tcl has long been an integral part of Python. It provides a robust and
platform independent windowing toolkit, that is available to Python programmers
-using the :mod:`tkinter` package, and its extension, the :mod:`tkinter.tix`
+using the :mod:`tkinter` package, and its extension, the :mod:`tkinter.tix`
module.
The :mod:`tkinter` package is a thin object-oriented layer on top of Tcl/Tk. To
@@ -23,15 +23,15 @@
mechanism which allows Python and Tcl to interact.
:mod:`tkinter`'s chief virtues are that it is fast, and that it usually comes
-bundled with Python. Although its standard documentation is weak, good
-material is available, which includes: references, tutorials, a book and
-others. :mod:`tkinter` is also famous for having an outdated look and feel,
-which has been vastly improved in Tk 8.5. Nevertheless, there are many other
-GUI libraries that you could be interested in. For more information about
+bundled with Python. Although its standard documentation is weak, good
+material is available, which includes: references, tutorials, a book and
+others. :mod:`tkinter` is also famous for having an outdated look and feel,
+which has been vastly improved in Tk 8.5. Nevertheless, there are many other
+GUI libraries that you could be interested in. For more information about
alternatives, see the :ref:`other-gui-packages` section.
.. toctree::
-
+
tkinter.rst
tkinter.tix.rst
tkinter.scrolledtext.rst