I have a future statement in a script which is intended to work in 2.6 and 3.
Shouldn't compile flags in __future__ objects essentially be noops for versions
that already support the feature? doctest is complaining about unrecognised
flags.  This illustrates the problem:

    Python 3.0 (r30:67507, Dec  3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] 
on win
    32
    Type "help", "copyright", "credits" or "license" for more information.
    >>> from __future__ import unicode_literals
    >>> src = 'a = "hello"'
    >>> c1 = compile(src,'<string>','exec',unicode_literals.compiler_flag)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    ValueError: compile(): unrecognised flags

-- 
Yorick
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