Remove regsub, reconvert, regex, regex_syntax and everything under lib-old.
diff --git a/Demo/pdist/makechangelog.py b/Demo/pdist/makechangelog.py
index b26f30b..1ffa588 100755
--- a/Demo/pdist/makechangelog.py
+++ b/Demo/pdist/makechangelog.py
@@ -6,7 +6,7 @@
 
 import sys
 import string
-import regex
+import re
 import getopt
 import time
 
@@ -35,9 +35,9 @@
     for rev in allrevs:
         formatrev(rev, prefix)
 
-parsedateprog = regex.compile(
-    '^date: \([0-9]+\)/\([0-9]+\)/\([0-9]+\) ' +
-    '\([0-9]+\):\([0-9]+\):\([0-9]+\);  author: \([^ ;]+\)')
+parsedateprog = re.compile(
+    '^date: ([0-9]+)/([0-9]+)/([0-9]+) ' +
+    '([0-9]+):([0-9]+):([0-9]+);  author: ([^ ;]+)')
 
 authormap = {
     'guido': 'Guido van Rossum  <guido@cnri.reston.va.us>',
@@ -70,7 +70,7 @@
         print
         print
 
-startprog = regex.compile("^Working file: \(.*\)$")
+startprog = re.compile("^Working file: (.*)$")
 
 def getnextfile(f):
     while 1:
diff --git a/Demo/pdist/rcsbump b/Demo/pdist/rcsbump
index e4e9ed5..4fa078e 100755
--- a/Demo/pdist/rcsbump
+++ b/Demo/pdist/rcsbump
@@ -6,12 +6,12 @@
 # Python script for bumping up an RCS major revision number.
 
 import sys
-import regex
+import re
 import rcslib
 import string
 
 WITHLOCK = 1
-majorrev_re = regex.compile('^[0-9]+')
+majorrev_re = re.compile('^[0-9]+')
 
 dir = rcslib.RCS()
 
diff --git a/Demo/pdist/rcslib.py b/Demo/pdist/rcslib.py
index d5f7b65..3e63869 100755
--- a/Demo/pdist/rcslib.py
+++ b/Demo/pdist/rcslib.py
@@ -8,7 +8,7 @@
 
 import fnmatch
 import os
-import regsub
+import re
 import string
 import tempfile
 
@@ -150,7 +150,7 @@
             cmd = 'ci %s%s -t%s %s %s' % \
                   (lockflag, rev, f.name, otherflags, name)
         else:
-            message = regsub.gsub('\([\\"$`]\)', '\\\\\\1', message)
+            message = re.sub(r'([\"$`])', r'\\\1', message)
             cmd = 'ci %s%s -m"%s" %s %s' % \
                   (lockflag, rev, message, otherflags, name)
         return self._system(cmd)