| 1234567891011121314151617181920212223242526272829303132 | 'use strict';const utils = require('./utils');module.exports = (ast, options = {}) => {  let stringify = (node, parent = {}) => {    let invalidBlock = options.escapeInvalid && utils.isInvalidBrace(parent);    let invalidNode = node.invalid === true && options.escapeInvalid === true;    let output = '';    if (node.value) {      if ((invalidBlock || invalidNode) && utils.isOpenOrClose(node)) {        return '\\' + node.value;      }      return node.value;    }    if (node.value) {      return node.value;    }    if (node.nodes) {      for (let child of node.nodes) {        output += stringify(child);      }    }    return output;  };  return stringify(ast);};
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