String method conversion.
diff --git a/Lib/tokenize.py b/Lib/tokenize.py
index 3014b19..9f46612 100644
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -26,7 +26,7 @@
# Imagnumber is new. Expfloat is corrected to reject '0e4'.
# Note: to quote a backslash in a regex, it must be doubled in a r'aw' string.
-def group(*choices): return '(' + string.join(choices, '|') + ')'
+def group(*choices): return '(' + '|'.join(choices) + ')'
def any(*choices): return apply(group, choices) + '*'
def maybe(*choices): return apply(group, choices) + '?'