Fix indentation error in example from the Tkinter Life Preserver.
This closes SF bug #499505.
diff --git a/Doc/lib/tkinter.tex b/Doc/lib/tkinter.tex
index 04f84e3..034771b 100644
--- a/Doc/lib/tkinter.tex
+++ b/Doc/lib/tkinter.tex
@@ -242,7 +242,7 @@
                                                                         21
     def __init__(self, master=None):                                    22
         Frame.__init__(self, master)                                    23
-            self.pack()                                                 24
+        self.pack()                                                     24
         self.createWidgets()                                            25
                                                                         26
 app = Application()                                                     27