Whitespace normalization, via reindent.py.
diff --git a/Demo/tkinter/matt/canvas-gridding.py b/Demo/tkinter/matt/canvas-gridding.py
index b200ea4..3c52b91 100644
--- a/Demo/tkinter/matt/canvas-gridding.py
+++ b/Demo/tkinter/matt/canvas-gridding.py
@@ -1,60 +1,60 @@
 from Tkinter import *
 
-# this is the same as simple-demo-1.py, but uses 
-# subclassing. 
-# note that there is no explicit call to start Tk. 
-# Tkinter is smart enough to start the system if it's not already going. 
+# this is the same as simple-demo-1.py, but uses
+# subclassing.
+# note that there is no explicit call to start Tk.
+# Tkinter is smart enough to start the system if it's not already going.
 
 class Test(Frame):
     def printit(self):
-	print "hi"
+        print "hi"
 
     def createWidgets(self):
-	self.QUIT = Button(self, text='QUIT', 
-				  background='red', 
-				  foreground='white', 
-				  height=3, 
-				  command=self.quit)
-	self.QUIT.pack(side=BOTTOM, fill=BOTH)	
+        self.QUIT = Button(self, text='QUIT',
+                                  background='red',
+                                  foreground='white',
+                                  height=3,
+                                  command=self.quit)
+        self.QUIT.pack(side=BOTTOM, fill=BOTH)
 
-	self.canvasObject = Canvas(self, width="5i", height="5i")
-	self.canvasObject.pack(side=LEFT)
+        self.canvasObject = Canvas(self, width="5i", height="5i")
+        self.canvasObject.pack(side=LEFT)
 
     def mouseDown(self, event):
-	# canvas x and y take the screen coords from the event and translate
-	# them into the coordinate system of the canvas object
-	self.startx = self.canvasObject.canvasx(event.x, self.griddingSize)
-	self.starty = self.canvasObject.canvasy(event.y, self.griddingSize)
+        # canvas x and y take the screen coords from the event and translate
+        # them into the coordinate system of the canvas object
+        self.startx = self.canvasObject.canvasx(event.x, self.griddingSize)
+        self.starty = self.canvasObject.canvasy(event.y, self.griddingSize)
 
     def mouseMotion(self, event):
-	# canvas x and y take the screen coords from the event and translate
-	# them into the coordinate system of the canvas object
-	x = self.canvasObject.canvasx(event.x, self.griddingSize)
-	y = self.canvasObject.canvasy(event.y, self.griddingSize)
+        # canvas x and y take the screen coords from the event and translate
+        # them into the coordinate system of the canvas object
+        x = self.canvasObject.canvasx(event.x, self.griddingSize)
+        y = self.canvasObject.canvasy(event.y, self.griddingSize)
 
-	if (self.startx != event.x)  and (self.starty != event.y) : 
-	    self.canvasObject.delete(self.rubberbandBox)
-	    self.rubberbandBox = self.canvasObject.create_rectangle(
-		self.startx, self.starty, x, y)
-	    # this flushes the output, making sure that 
-	    # the rectangle makes it to the screen 
-	    # before the next event is handled
-	    self.update_idletasks()
+        if (self.startx != event.x)  and (self.starty != event.y) :
+            self.canvasObject.delete(self.rubberbandBox)
+            self.rubberbandBox = self.canvasObject.create_rectangle(
+                self.startx, self.starty, x, y)
+            # this flushes the output, making sure that
+            # the rectangle makes it to the screen
+            # before the next event is handled
+            self.update_idletasks()
 
     def __init__(self, master=None):
-	Frame.__init__(self, master)
-	Pack.config(self)
-	self.createWidgets()
+        Frame.__init__(self, master)
+        Pack.config(self)
+        self.createWidgets()
 
-	# this is a "tagOrId" for the rectangle we draw on the canvas
-	self.rubberbandBox = None
+        # this is a "tagOrId" for the rectangle we draw on the canvas
+        self.rubberbandBox = None
 
-	# this is the size of the gridding squares
-	self.griddingSize = 50
+        # this is the size of the gridding squares
+        self.griddingSize = 50
 
-	Widget.bind(self.canvasObject, "<Button-1>", self.mouseDown)
-	Widget.bind(self.canvasObject, "<Button1-Motion>", self.mouseMotion)
-	
+        Widget.bind(self.canvasObject, "<Button-1>", self.mouseDown)
+        Widget.bind(self.canvasObject, "<Button1-Motion>", self.mouseMotion)
+
 
 test = Test()