Whitespace normalization, via reindent.py.
diff --git a/Tools/freeze/bkfile.py b/Tools/freeze/bkfile.py
index d29716a..54af2fa 100644
--- a/Tools/freeze/bkfile.py
+++ b/Tools/freeze/bkfile.py
@@ -1,47 +1,47 @@
 _orig_open = open
 
 class _BkFile:
-	def __init__(self, file, mode, bufsize):
-		import os
-		self.__filename = file
-		self.__backup = file + '~'
-		try:
-			os.unlink(self.__backup)
-		except os.error:
-			pass
-		try:
-			os.rename(file, self.__backup)
-		except os.error:
-			self.__backup = None
-		self.__file = _orig_open(file, mode, bufsize)
-		self.closed = self.__file.closed
-		self.fileno = self.__file.fileno
-		self.flush = self.__file.flush
-		self.isatty = self.__file.isatty
-		self.mode = self.__file.mode
-		self.name = self.__file.name
-		self.read = self.__file.read
-		self.readinto = self.__file.readinto
-		self.readline = self.__file.readline
-		self.readlines = self.__file.readlines
-		self.seek = self.__file.seek
-		self.softspace = self.__file.softspace
-		self.tell = self.__file.tell
-		self.truncate = self.__file.truncate
-		self.write = self.__file.write
-		self.writelines = self.__file.writelines
+    def __init__(self, file, mode, bufsize):
+        import os
+        self.__filename = file
+        self.__backup = file + '~'
+        try:
+            os.unlink(self.__backup)
+        except os.error:
+            pass
+        try:
+            os.rename(file, self.__backup)
+        except os.error:
+            self.__backup = None
+        self.__file = _orig_open(file, mode, bufsize)
+        self.closed = self.__file.closed
+        self.fileno = self.__file.fileno
+        self.flush = self.__file.flush
+        self.isatty = self.__file.isatty
+        self.mode = self.__file.mode
+        self.name = self.__file.name
+        self.read = self.__file.read
+        self.readinto = self.__file.readinto
+        self.readline = self.__file.readline
+        self.readlines = self.__file.readlines
+        self.seek = self.__file.seek
+        self.softspace = self.__file.softspace
+        self.tell = self.__file.tell
+        self.truncate = self.__file.truncate
+        self.write = self.__file.write
+        self.writelines = self.__file.writelines
 
-	def close(self):
-		self.__file.close()
-		if self.__backup is None:
-			return
-		import filecmp
-		if filecmp.cmp(self.__backup, self.__filename, shallow = 0):
-			import os
-			os.unlink(self.__filename)
-			os.rename(self.__backup, self.__filename)
+    def close(self):
+        self.__file.close()
+        if self.__backup is None:
+            return
+        import filecmp
+        if filecmp.cmp(self.__backup, self.__filename, shallow = 0):
+            import os
+            os.unlink(self.__filename)
+            os.rename(self.__backup, self.__filename)
 
 def open(file, mode = 'r', bufsize = -1):
-	if 'w' not in mode:
-		return _orig_open(file, mode, bufsize)
-	return _BkFile(file, mode, bufsize)
+    if 'w' not in mode:
+        return _orig_open(file, mode, bufsize)
+    return _BkFile(file, mode, bufsize)