Function d3_collapse

explainshell/web/static/js/d3.v3.js:665–667

(s)

    return value == null ? name.local ? attrNullNS : attrNull : typeof value === "function" ? name.local ? attrFunctionNS : attrFunction : name.local ? attrConstantNS : attrConstant;
  }
  function d3_collapse(s) {
    return s.trim().replace(/\s+/g, " ");
  }
  d3.requote = function(s) {
    return s.replace(d3_requote_re, "\\$&");
  };