IO.print(String.fromCodePoint(65))   // expect: A
IO.print(String.fromCodePoint(164))   // expect: ¤
IO.print(String.fromCodePoint(398))   // expect: Ǝ
IO.print(String.fromCodePoint(8225))   // expect: ‡
IO.print(String.fromCodePoint(0x254b))   // expect: ╋