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// Unicode word boundaries know about Unicode characters.
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// For ASCII word boundaries, the tests are precisely inverted.
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matiter!(unicode1, r"\bx\b", "áxβ");
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matiter!(unicode2, r"\Bx\B", "áxβ", (2, 3));
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matiter!(ascii1, r"(?-u:\b)x(?-u:\b)", "áxβ", (2, 3));
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