The ">" alignment flag to format() is not right aligning numbers
properly on trunk and the py3k branch:

>>> format(0x1234, "+#08x")
'+0x01234'
>>> format(0x1234, "0=+#8x")
'+0x01234'
>>> format(0x1234, "0>+#8x")
'+0x01234'

That last one should be:
>>> format(0x1234, "0>+#8x")
'0+0x1234'

The intended behaviour of ">" is more obviously correct when you
consider a leading space instead of a leading zero:

>>> format(0x1234, " >+#8x")
' +0x1234'

This is only an error on the development versions - the behaviour is
correct on the 2.6 and 3.1 maintenance branches.