Whitespace normalization.
diff --git a/Lib/string.py b/Lib/string.py
index 0dffb2a..61b253e 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -27,7 +27,7 @@
 digits = '0123456789'
 hexdigits = digits + 'abcdef' + 'ABCDEF'
 octdigits = '01234567'
-punctuation = """!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~""" 
+punctuation = """!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~"""
 printable = digits + letters + punctuation + whitespace
 
 # Case conversion helpers