diff --git a/Doc/lib/caseless.py b/Doc/lib/caseless.py
index b128219..cae94be 100755
--- a/Doc/lib/caseless.py
+++ b/Doc/lib/caseless.py
@@ -45,7 +45,7 @@
         print "ok: got OptionConflictError for -H"
     else:
         print "not ok: no conflict between -h and -H"
-    
+
     parser.add_option("-f", "--file", dest="file")
     #print repr(parser.get_option("-f"))
     #print repr(parser.get_option("-F"))
@@ -58,5 +58,3 @@
     (options, args) = parser.parse_args(["-F", "bar"])
     assert options.file == "bar", options.file
     print "ok: case insensitive short options work"
-    
-    
diff --git a/Doc/lib/email-dir.py b/Doc/lib/email-dir.py
index bc26b3c..2d89a2f 100644
--- a/Doc/lib/email-dir.py
+++ b/Doc/lib/email-dir.py
@@ -66,7 +66,7 @@
 
     sender = args[0]
     recips = args[1:]
-    
+
     # Create the enclosing (outer) message
     outer = MIMEMultipart()
     outer['Subject'] = 'Contents of directory %s' % os.path.abspath(dir)
diff --git a/Doc/lib/minidom-example.py b/Doc/lib/minidom-example.py
index 3fa15dd..c30c4e0 100644
--- a/Doc/lib/minidom-example.py
+++ b/Doc/lib/minidom-example.py
@@ -35,7 +35,7 @@
 
 def handleSlides(slides):
     for slide in slides:
-       handleSlide(slide)
+        handleSlide(slide)
 
 def handleSlide(slide):
     handleSlideTitle(slide.getElementsByTagName("title")[0])
diff --git a/Doc/lib/required_1.py b/Doc/lib/required_1.py
index 44d5b30..6be5668 100755
--- a/Doc/lib/required_1.py
+++ b/Doc/lib/required_1.py
@@ -3,11 +3,11 @@
 class OptionParser (optparse.OptionParser):
 
     def check_required (self, opt):
-      option = self.get_option(opt)
+        option = self.get_option(opt)
 
-      # Assumes the option's 'default' is set to None!
-      if getattr(self.values, option.dest) is None:
-          self.error("%s option not supplied" % option)
+        # Assumes the option's 'default' is set to None!
+        if getattr(self.values, option.dest) is None:
+            self.error("%s option not supplied" % option)
 
 
 parser = OptionParser()