[issue6549] ttk.Style -- minor issues with element_names and configure

[Ethan Furman]

Changes by Ethan Furman <ethan at stoneleaf.us>:


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versions: +Python 3.5 -Python 2.7, Python 3.2, Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6549>
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