doublewidth

Undocumented in source.
auto doublewidth = [[0x1100, 0x115F], [0x231A, 0x231B], [0x2329, 0x232A], [0x23E9, 0x23EC], [0x23F0, 0x23F0], [0x23F3, 0x23F3], [0x25FD, 0x25FE], [0x2614, 0x2615], [0x2648, 0x2653], [0x267F, 0x267F], [0x2693, 0x2693], [0x26A1, 0x26A1], [0x26AA, 0x26AB], [0x26BD, 0x26BE], [0x26C4, 0x26C5], [0x26CE, 0x26CE], [0x26D4, 0x26D4], [0x26EA, 0x26EA], [0x26F2, 0x26F3], [0x26F5, 0x26F5], [0x26FA, 0x26FA], [0x26FD, 0x26FD], [0x2705, 0x2705], [0x270A, 0x270B], [0x2728, 0x2728], [0x274C, 0x274C], [0x274E, 0x274E], [0x2753, 0x2755], [0x2757, 0x2757], [0x2795, 0x2797], [0x27B0, 0x27B0], [0x27BF, 0x27BF], [0x2B1B, 0x2B1C], [0x2B50, 0x2B50], [0x2B55, 0x2B55], [0x2E80, 0x2E99], [0x2E9B, 0x2EF3], [0x2F00, 0x2FD5], [0x2FF0, 0x2FFB], [0x3000, 0x303E], [0x3041, 0x3096], [0x3099, 0x30FF], [0x3105, 0x312D], [0x3131, 0x318E], [0x3190, 0x31BA], [0x31C0, 0x31E3], [0x31F0, 0x321E], [0x3220, 0x3247], [0x3250, 0x32FE], [0x3300, 0x4DBF], [0x4E00, 0xA48C], [0xA490, 0xA4C6], [0xA960, 0xA97C], [0xAC00, 0xD7A3], [0xF900, 0xFAFF], [0xFE10, 0xFE19], [0xFE30, 0xFE52], [0xFE54, 0xFE66], [0xFE68, 0xFE6B], [0xFF01, 0xFF60], [0xFFE0, 0xFFE6], [0x16FE0, 0x16FE0], [0x17000, 0x187EC], [0x18800, 0x18AF2], [0x1B000, 0x1B001], [0x1F004, 0x1F004], [0x1F0CF, 0x1F0CF], [0x1F18E, 0x1F18E], [0x1F191, 0x1F19A], [0x1F200, 0x1F202], [0x1F210, 0x1F23B], [0x1F240, 0x1F248], [0x1F250, 0x1F251], [0x1F300, 0x1F320], [0x1F32D, 0x1F335], [0x1F337, 0x1F37C], [0x1F37E, 0x1F393], [0x1F3A0, 0x1F3CA], [0x1F3CF, 0x1F3D3], [0x1F3E0, 0x1F3F0], [0x1F3F4, 0x1F3F4], [0x1F3F8, 0x1F43E], [0x1F440, 0x1F440], [0x1F442, 0x1F4FC], [0x1F4FF, 0x1F53D], [0x1F54B, 0x1F54E], [0x1F550, 0x1F567], [0x1F57A, 0x1F57A], [0x1F595, 0x1F596], [0x1F5A4, 0x1F5A4], [0x1F5FB, 0x1F64F], [0x1F680, 0x1F6C5], [0x1F6CC, 0x1F6CC], [0x1F6D0, 0x1F6D2], [0x1F6EB, 0x1F6EC], [0x1F6F4, 0x1F6F6], [0x1F910, 0x1F91E], [0x1F920, 0x1F927], [0x1F930, 0x1F930], [0x1F933, 0x1F93E], [0x1F940, 0x1F94B], [0x1F950, 0x1F95E], [0x1F980, 0x1F991], [0x1F9C0, 0x1F9C0], [0x20000, 0x2FFFD], [0x30000, 0x3FFFD]];

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