[PATCH] vbscript/tests: Add some tests for IRegExp2::Replace().

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek at codeweavers.com>

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FWIW, we could use L"" literals now and get rid of a2bstr. But it's fine 
for now, until we do it for the rest of the file.