F..
======================================================================
FAIL: testStyles (__main__.PrettyTest)
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Traceback (most recent call last):
  File "/home/uke/oil/data_lang/pretty_test.py", line 103, in testStyles
    ", " + ansi.YELLOW + '15' + ansi.RESET + ']')
  File "/home/uke/oil/data_lang/pretty_test.py", line 51, in assertPretty
    self.assertEqual(buf.getvalue(), expected)
AssertionError: "(\x1b[35mList\x1b[0;0m)\n[\x1b[1mnull\x1b[0;0m, \x1b[32m'ok'\x1b[0;0m, \x1b[33m15\x1b[0;0m]" != "(List)\n[\x1b[1m\x1b[31mnull\x1b[0;0m, \x1b[32m'ok'\x1b[0;0m, \x1b[33m15\x1b[0;0m]"

----------------------------------------------------------------------
Ran 3 tests in 0.027s

FAILED (failures=1)
ACTUAL:
(List)
[null, 'ok', 15]
EXPECTED:
(List)
[null, 'ok', 15]
END