Change "[%s]" % string.whitespace to r"\s" in regular expressions.
diff --git a/Lib/sgmllib.py b/Lib/sgmllib.py
index 1f8f3b8..19580e2 100644
--- a/Lib/sgmllib.py
+++ b/Lib/sgmllib.py
@@ -33,12 +33,11 @@
endbracket = re.compile('[<>]')
special = re.compile('<![^<>]*>')
commentopen = re.compile('<!--')
-commentclose = re.compile('--[%s]*>' % string.whitespace)
+commentclose = re.compile(r'--\s*>')
tagfind = re.compile('[a-zA-Z][-.a-zA-Z0-9]*')
attrfind = re.compile(
- '[%s]*([a-zA-Z_][-.a-zA-Z_0-9]*)' % string.whitespace
- + ('([%s]*=[%s]*' % (string.whitespace, string.whitespace))
- + r'(\'[^\']*\'|"[^"]*"|[-a-zA-Z0-9./:;+*%?!&$\(\)_#=~]*))?')
+ r'\s*([a-zA-Z_][-.a-zA-Z_0-9]*)(\s*=\s*'
+ r'(\'[^\']*\'|"[^"]*"|[-a-zA-Z0-9./:;+*%?!&$\(\)_#=~]*))?')
# SGML parser base class -- find tags and call handler functions.