Better handling of string lexing#140

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chewxy wants to merge 3 commits intovektah:masterfrom

Commits on Dec 22, 2020

added functionality to parse \\xHH with a decent fall back
chewxy
committed

Commits on Dec 23, 2020

go-fuzz found a crasher. Fixed it
chewxy
committed
boyscout: clean up switch cases so they all line up vertically. Makes the cases easier to read
chewxy
committed