[issue10966] eliminate use of ImportError implicitly representing SkipTest

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

In terms of the symmetrical comment, what exactly do you mean? The semantics are opposites of each other. Do you not like the name? Or did I screw up and they truly aren't opposites?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10966>
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