Fix a typo
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According to the UTF-8 spec, ASCII character's charcode is from 0 to 127 inclusively.
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Any charcode which is greater than or equal to 128 will be a multi-byte character.
According to the UTF-8 spec, ASCII character's charcode is from 0 to 127 inclusively.
Any charcode which is greater than or equal to 128 will be a multi-byte character.