Whitespace normalization, via reindent.py.
diff --git a/Demo/tkinter/guido/dialog.py b/Demo/tkinter/guido/dialog.py
index 1f794ae..50d84b9 100755
--- a/Demo/tkinter/guido/dialog.py
+++ b/Demo/tkinter/guido/dialog.py
@@ -25,11 +25,11 @@
     # 2. Fill the top part with the bitmap and message.
 
     msg = Message(top, width='3i', text=text,
-		  font='-Adobe-Times-Medium-R-Normal-*-180-*')
+                  font='-Adobe-Times-Medium-R-Normal-*-180-*')
     msg.pack(side=RIGHT, expand=1, fill=BOTH, padx='3m', pady='3m')
     if bitmap:
-	bm = Label(top, bitmap=bitmap)
-	bm.pack(side=LEFT, padx='3m', pady='3m')
+        bm = Label(top, bitmap=bitmap)
+        bm.pack(side=LEFT, padx='3m', pady='3m')
 
     # 3. Create a row of buttons at the bottom of the dialog.
 
@@ -37,27 +37,27 @@
     buttons = []
     i = 0
     for but in args:
-	b = Button(bot, text=but, command=lambda v=var,i=i: v.set(i))
-	buttons.append(b)
-	if i == default:
-	    bd = Frame(bot, relief=SUNKEN, borderwidth=1)
-	    bd.pack(side=LEFT, expand=1, padx='3m', pady='2m')
-	    b.lift()
-	    b.pack (in_=bd, side=LEFT,
-		    padx='2m', pady='2m', ipadx='2m', ipady='1m')
-	else:
-	    b.pack (side=LEFT, expand=1,
-		    padx='3m', pady='3m', ipadx='2m', ipady='1m')
-	i = i+1
+        b = Button(bot, text=but, command=lambda v=var,i=i: v.set(i))
+        buttons.append(b)
+        if i == default:
+            bd = Frame(bot, relief=SUNKEN, borderwidth=1)
+            bd.pack(side=LEFT, expand=1, padx='3m', pady='2m')
+            b.lift()
+            b.pack (in_=bd, side=LEFT,
+                    padx='2m', pady='2m', ipadx='2m', ipady='1m')
+        else:
+            b.pack (side=LEFT, expand=1,
+                    padx='3m', pady='3m', ipadx='2m', ipady='1m')
+        i = i+1
 
     # 4. Set up a binding for <Return>, if there's a default,
     # set a grab, and claim the focus too.
 
     if default >= 0:
-	w.bind('<Return>',
-	       lambda e, b=buttons[default], v=var, i=default:
-	       (b.flash(),
-		v.set(i)))
+        w.bind('<Return>',
+               lambda e, b=buttons[default], v=var, i=default:
+               (b.flash(),
+                v.set(i)))
 
     oldFocus = w.focus_get()
     w.grab_set()
@@ -75,23 +75,23 @@
 
 def go():
     i = dialog(mainWidget,
-	       'Not Responding',
-	       "The file server isn't responding right now; "
-	       "I'll keep trying.",
-	       '',
-	       -1,
-	       'OK')
+               'Not Responding',
+               "The file server isn't responding right now; "
+               "I'll keep trying.",
+               '',
+               -1,
+               'OK')
     print 'pressed button', i
     i = dialog(mainWidget,
-	       'File Modified',
-	       'File "tcl.h" has been modified since '
-	       'the last time it was saved. '
-	       'Do you want to save it before exiting the application?',
-	       'warning',
-	       0,
-	       'Save File',
-	       'Discard Changes',
-	       'Return To Editor')
+               'File Modified',
+               'File "tcl.h" has been modified since '
+               'the last time it was saved. '
+               'Do you want to save it before exiting the application?',
+               'warning',
+               0,
+               'Save File',
+               'Discard Changes',
+               'Return To Editor')
     print 'pressed button', i
 
 def test():