Whitespace normalization, via reindent.py.
diff --git a/Demo/tkinter/guido/ShellWindow.py b/Demo/tkinter/guido/ShellWindow.py
index 98fe30f..609101b 100755
--- a/Demo/tkinter/guido/ShellWindow.py
+++ b/Demo/tkinter/guido/ShellWindow.py
@@ -10,142 +10,142 @@
 
 class ShellWindow(ScrolledText):
 
-	def __init__(self, master=None, shell=None, **cnf):
-		if not shell:
-			try:
-				shell = os.environ['SHELL']
-			except KeyError:
-				shell = '/bin/sh'
-			shell = shell + ' -i'
-		args = string.split(shell)
-		shell = args[0]
+    def __init__(self, master=None, shell=None, **cnf):
+        if not shell:
+            try:
+                shell = os.environ['SHELL']
+            except KeyError:
+                shell = '/bin/sh'
+            shell = shell + ' -i'
+        args = string.split(shell)
+        shell = args[0]
 
-		apply(ScrolledText.__init__, (self, master), cnf)
-		self.pos = '1.0'
-		self.bind('<Return>', self.inputhandler)
-		self.bind('<Control-c>', self.sigint)
-		self.bind('<Control-t>', self.sigterm)
-		self.bind('<Control-k>', self.sigkill)
-		self.bind('<Control-d>', self.sendeof)
+        apply(ScrolledText.__init__, (self, master), cnf)
+        self.pos = '1.0'
+        self.bind('<Return>', self.inputhandler)
+        self.bind('<Control-c>', self.sigint)
+        self.bind('<Control-t>', self.sigterm)
+        self.bind('<Control-k>', self.sigkill)
+        self.bind('<Control-d>', self.sendeof)
 
-		self.pid, self.fromchild, self.tochild = spawn(shell, args)
-		self.tk.createfilehandler(self.fromchild, READABLE,
-					  self.outputhandler)
+        self.pid, self.fromchild, self.tochild = spawn(shell, args)
+        self.tk.createfilehandler(self.fromchild, READABLE,
+                                  self.outputhandler)
 
-	def outputhandler(self, file, mask):
-		data = os.read(file, BUFSIZE)
-		if not data:
-			self.tk.deletefilehandler(file)
-			pid, sts = os.waitpid(self.pid, 0)
-			print 'pid', pid, 'status', sts
-			self.pid = None
-			detail = sts>>8
-			cause = sts & 0xff
-			if cause == 0:
-				msg = "exit status %d" % detail
-			else:
-				msg = "killed by signal %d" % (cause & 0x7f)
-				if cause & 0x80:
-					msg = msg + " -- core dumped"
-			Dialog(self.master,
-			       text=msg,
-			       title="Exit status",
-			       bitmap='warning',
-			       default=0,
-			       strings=('OK',))
-			return
-		self.insert(END, data)
-		self.pos = self.index("end - 1 char")
-		self.yview_pickplace(END)
+    def outputhandler(self, file, mask):
+        data = os.read(file, BUFSIZE)
+        if not data:
+            self.tk.deletefilehandler(file)
+            pid, sts = os.waitpid(self.pid, 0)
+            print 'pid', pid, 'status', sts
+            self.pid = None
+            detail = sts>>8
+            cause = sts & 0xff
+            if cause == 0:
+                msg = "exit status %d" % detail
+            else:
+                msg = "killed by signal %d" % (cause & 0x7f)
+                if cause & 0x80:
+                    msg = msg + " -- core dumped"
+            Dialog(self.master,
+                   text=msg,
+                   title="Exit status",
+                   bitmap='warning',
+                   default=0,
+                   strings=('OK',))
+            return
+        self.insert(END, data)
+        self.pos = self.index("end - 1 char")
+        self.yview_pickplace(END)
 
-	def inputhandler(self, *args):
-		if not self.pid:
-			self.no_process()
-			return "break"
-		self.insert(END, "\n")
-		line = self.get(self.pos, "end - 1 char")
-		self.pos = self.index(END)
-		os.write(self.tochild, line)
-		return "break"
+    def inputhandler(self, *args):
+        if not self.pid:
+            self.no_process()
+            return "break"
+        self.insert(END, "\n")
+        line = self.get(self.pos, "end - 1 char")
+        self.pos = self.index(END)
+        os.write(self.tochild, line)
+        return "break"
 
-	def sendeof(self, *args):
-		if not self.pid:
-			self.no_process()
-			return "break"
-		os.close(self.tochild)
-		return "break"
+    def sendeof(self, *args):
+        if not self.pid:
+            self.no_process()
+            return "break"
+        os.close(self.tochild)
+        return "break"
 
-	def sendsig(self, sig):
-		if not self.pid:
-			self.no_process()
-			return "break"
-		os.kill(self.pid, sig)
-		return "break"
+    def sendsig(self, sig):
+        if not self.pid:
+            self.no_process()
+            return "break"
+        os.kill(self.pid, sig)
+        return "break"
 
-	def sigint(self, *args):
-		return self.sendsig(signal.SIGINT)
+    def sigint(self, *args):
+        return self.sendsig(signal.SIGINT)
 
-	def sigquit(self, *args):
-		return self.sendsig(signal.SIGQUIT)
+    def sigquit(self, *args):
+        return self.sendsig(signal.SIGQUIT)
 
-	def sigterm(self, *args):
-		return self.sendsig(signal.SIGTERM)
+    def sigterm(self, *args):
+        return self.sendsig(signal.SIGTERM)
 
-	def sigkill(self, *args):
-		return self.sendsig(signal.SIGKILL)
+    def sigkill(self, *args):
+        return self.sendsig(signal.SIGKILL)
 
-	def no_process(self):
-		Dialog(self.master,
-		       text="No active process",
-		       title="No process",
-		       bitmap='error',
-		       default=0,
-		       strings=('OK',))
+    def no_process(self):
+        Dialog(self.master,
+               text="No active process",
+               title="No process",
+               bitmap='error',
+               default=0,
+               strings=('OK',))
 
-MAXFD = 100	# Max number of file descriptors (os.getdtablesize()???)
+MAXFD = 100     # Max number of file descriptors (os.getdtablesize()???)
 
 def spawn(prog, args):
-	p2cread, p2cwrite = os.pipe()
-	c2pread, c2pwrite = os.pipe()
-	pid = os.fork()
-	if pid == 0:
-		# Child
-		for i in 0, 1, 2:
-		    try:
-			os.close(i)
-		    except os.error:
-			pass
-		if os.dup(p2cread) <> 0:
-			sys.stderr.write('popen2: bad read dup\n')
-		if os.dup(c2pwrite) <> 1:
-			sys.stderr.write('popen2: bad write dup\n')
-		if os.dup(c2pwrite) <> 2:
-			sys.stderr.write('popen2: bad write dup\n')
-		for i in range(3, MAXFD):
-			try:
-				os.close(i)
-			except:
-				pass
-		try:
-			os.execvp(prog, args)
-		finally:
-			sys.stderr.write('execvp failed\n')
-			os._exit(1)
-	os.close(p2cread)
-	os.close(c2pwrite)
-	return pid, c2pread, p2cwrite
+    p2cread, p2cwrite = os.pipe()
+    c2pread, c2pwrite = os.pipe()
+    pid = os.fork()
+    if pid == 0:
+        # Child
+        for i in 0, 1, 2:
+            try:
+                os.close(i)
+            except os.error:
+                pass
+        if os.dup(p2cread) <> 0:
+            sys.stderr.write('popen2: bad read dup\n')
+        if os.dup(c2pwrite) <> 1:
+            sys.stderr.write('popen2: bad write dup\n')
+        if os.dup(c2pwrite) <> 2:
+            sys.stderr.write('popen2: bad write dup\n')
+        for i in range(3, MAXFD):
+            try:
+                os.close(i)
+            except:
+                pass
+        try:
+            os.execvp(prog, args)
+        finally:
+            sys.stderr.write('execvp failed\n')
+            os._exit(1)
+    os.close(p2cread)
+    os.close(c2pwrite)
+    return pid, c2pread, p2cwrite
 
 def test():
-	shell = string.join(sys.argv[1:])
-	root = Tk()
-	root.minsize(1, 1)
-	if shell:
-	    w = ShellWindow(root, shell=shell)
-	else:
-	    w = ShellWindow(root)
-	w.pack(expand=1, fill=BOTH)
-	w.focus_set()
-	w.tk.mainloop()
+    shell = string.join(sys.argv[1:])
+    root = Tk()
+    root.minsize(1, 1)
+    if shell:
+        w = ShellWindow(root, shell=shell)
+    else:
+        w = ShellWindow(root)
+    w.pack(expand=1, fill=BOTH)
+    w.focus_set()
+    w.tk.mainloop()
 
 if __name__ == '__main__':
-	test()
+    test()