typesetting/_math-sign.js at 25ad7a0e60f212b65f699426f30b64c544122e49 - typesetting - Gitea: Git with a cup of tea

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 // 20.2.2.28 Math.sign(x)
 module.exports = Math.sign || function sign(x){
   return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
 };