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Currently, there is a bug with parsing UTF-8 or ASCII Extended characters: the C call
isspace()doesn't accept negativecharvalues. The simple fix is to cast the value to anunsigned char, which is fine because no ASCII spaces can appear in the negatives of acharanyways.This PR also adds a test based on a modified version of Markus Kuhn's UTF-8 Demo Page, to ensure that it can parse a variety of characters. The demo is under the CC BY license which allows unrestricted use with attribution, and the attribution is at the top of the file, so we should be good there.