regex traits test not testing wchar_t

[3dw4rd@verizon.net]

All,

I noticed this while prepping an experiment in binary number output.  I think a test of std::regex_traits<char> was simply copied to the wchar_t directory without changing the guts of the test.

Testing (on x86_64-linux) is ongoing but here is the patch and log.  I wanted to give fold a chance to look it over.

Ed

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