diff --git a/Lib/xml/dom/domreg.py b/Lib/xml/dom/domreg.py
index 0e6e615..117ca49 100644
--- a/Lib/xml/dom/domreg.py
+++ b/Lib/xml/dom/domreg.py
@@ -26,7 +26,7 @@
     interface. The factory function can either return the same object,
     or a new one (e.g. if that implementation supports some
     customization)."""
-    
+
     registered[name] = factory
 
 def _good_enough(dom, features):
@@ -48,7 +48,7 @@
     find one with the required feature set. If no implementation can
     be found, raise an ImportError. The features list must be a sequence
     of (feature, version) pairs which are passed to hasFeature."""
-    
+
     import os
     creator = None
     mod = well_known_implementations.get(name)
diff --git a/Lib/xml/dom/pulldom.py b/Lib/xml/dom/pulldom.py
index b2e1a46..18f49b5 100644
--- a/Lib/xml/dom/pulldom.py
+++ b/Lib/xml/dom/pulldom.py
@@ -236,7 +236,7 @@
 
     def __iter__(self):
         return self
-    
+
     def expandNode(self, node):
         event = self.getEvent()
         parents = [node]
diff --git a/Lib/xml/sax/handler.py b/Lib/xml/sax/handler.py
index 41105c0..25d55c1 100644
--- a/Lib/xml/sax/handler.py
+++ b/Lib/xml/sax/handler.py
@@ -326,7 +326,7 @@
 #                processing a META tag)
 #         read:  return the current encoding (possibly established through
 #                auto-detection.
-# initial value: UTF-8 
+# initial value: UTF-8
 #
 
 property_interning_dict = "http://www.python.org/sax/properties/interning-dict"
diff --git a/Lib/xml/sax/saxutils.py b/Lib/xml/sax/saxutils.py
index f55eef5..6544f17 100644
--- a/Lib/xml/sax/saxutils.py
+++ b/Lib/xml/sax/saxutils.py
@@ -20,7 +20,7 @@
 
 def escape(data, entities={}):
     """Escape &, <, and > in a string of data.
-    
+
     You can escape other strings of data by passing a dictionary as
     the optional entities parameter.  The keys and values must all be
     strings; each key will be replaced with its corresponding value.