text: module.exports = toHexReference
  
  var fromCharCode = require('../constant/from-char-code')
  
  // Transform `code` into a hexadecimal character reference.
  function toHexReference(code, next, omit) {
    var value = '&#x' + code.toString(16).toUpperCase()
    return omit && next && !/[\dA-Fa-f]/.test(fromCharCode(next))
      ? value
      : value + ';'
  }
  