PEP 3114: rename .next() to .__next__() and add next() builtin.
diff --git a/Lib/tokenize.py b/Lib/tokenize.py
index 8dc4c53..1a72d6f 100644
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -228,7 +228,7 @@
         # Output text will tokenize the back to the input
         t1 = [tok[:2] for tok in generate_tokens(f.readline)]
         newcode = untokenize(t1)
-        readline = iter(newcode.splitlines(1)).next
+        readline = iter(newcode.splitlines(1)).__next__
         t2 = [tok[:2] for tokin generate_tokens(readline)]
         assert t1 == t2
     """
@@ -242,7 +242,7 @@
     readline() method of built-in file objects. Each call to the function
     should return one line of input as a string.  Alternately, readline
     can be a callable function terminating with StopIteration:
-        readline = open(myfile).next    # Example of alternate readline
+        readline = open(myfile).__next__    # Example of alternate readline
 
     The generator produces 5-tuples with these members: the token type; the
     token string; a 2-tuple (srow, scol) of ints specifying the row and