Update tools to sort documentation

tools/extract_doc.py

@@ -1,8 +1,10 @@
 #!/usr/bin/env python
 
 import sys
+import re
 
-excludes = ['istats_diff.py']
+excludes = []
+# excludes = [r'.*_diff.py']
 
 filename = sys.argv[1]
 printName = False
@@ -15,7 +17,7 @@ if filename.endswith('__init__.py'):
     sys.exit(0)
 
 for e in excludes:
-    if filename.endswith(e):
+    if re.match(e, filename):
         sys.stderr.write('\tSkip %s\n' % (filename))
         sys.exit(0)