Function appendHeader

github-actions/saucelabs/set-saucelabs-env.js:12250–12269

(headers, name, value)

        iteratorMixin,
        isValidHeaderName,
        isValidHeaderValue
      } = require_util2();
      var { webidl } = require_webidl();
      var assert = __require("assert");
      var util = __require("util");
      var kHeadersMap = Symbol("headers map");
      var kHeadersSortedMap = Symbol("headers map sorted");
      function isHTTPWhiteSpaceCharCode(code) {
        return code === 10 || code === 13 || code === 9 || code === 32;
      }
      function headerValueNormalize(potentialValue) {
        let i = 0;
        let j = potentialValue.length;
        while (j > i && isHTTPWhiteSpaceCharCode(potentialValue.charCodeAt(j - 1)))
          --j;
        while (j > i && isHTTPWhiteSpaceCharCode(potentialValue.charCodeAt(i)))
          ++i;
        return i === 0 && j === potentialValue.length ? potentialValue : potentialValue.substring(i, j);
      }
      function fill(headers, object) {
        if (Array.isArray(object)) {
          for (let i = 0; i < object.length; ++i) {
            const header = object[i];