4 circumflex accent
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* a^::    a^.
* e^::    e^.
* i^::    i^.
* with brace i^::    i^.
* with dotless i^::   i^.
* o^::    o^.
* u^::    u^.
* A^::    A^.
* E^::    E^.
* I^::    I^.
* O^::    O^.
* U^::    U^.
4.1 a^
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4.2 e^
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4.3 i^
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4.4 i^
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Test @^{i}.
4.5 i^
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Test @^{@dotless{i}}.
4.6 o^
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4.7 u^
======
4.8 A^
======
4.9 E^
======
4.10 I^
=======
4.11 O^
=======
4.12 U^
=======
