old_contents: 'use strict';
  
  exports = module.exports = cliWidth;
  
  function normalizeOpts(options) {
    var defaultOpts = {
      defaultWidth: 0,
      output: process.stdout,
      tty: require('tty')
    };
  
    if (!options) {
      return defaultOpts;
    }
  
    Object.keys(defaultOpts).forEach(function (key) {
      if (!options[key]) {
        options[key] = defaultOpts[key];
      }
    });
  
    return options;
  }
  
  function cliWidth(options) {
    var opts = normalizeOpts(options);
  
    if (opts.output.getWindowSize) {
      return opts.output.getWindowSize()[0] || opts.defaultWidth;
    }
  
    if (opts.tty.getWindowSize) {
      return opts.tty.getWindowSize()[1] || opts.defaultWidth;
    }
  
    if (opts.output.columns) {
      return opts.output.columns;
    }
  
    if (process.env.CLI_WIDTH) {
      var width = parseInt(process.env.CLI_WIDTH, 10);
  
      if (!isNaN(width) && width !== 0) {
        return width;
      }
    }
  
    return opts.defaultWidth;
  };
  
new_contents: "use strict";
  
  exports = module.exports = cliWidth;
  
  function normalizeOpts(options) {
    let defaultOpts = {
      defaultWidth: 0,
      output: process.stdout,
      tty: require("tty"),
    };
  
    if (!options) {
      return defaultOpts;
    }
  
    Object.keys(defaultOpts).forEach(function (key) {
      if (!options[key]) {
        options[key] = defaultOpts[key];
      }
    });
  
    return options;
  }
  
  function cliWidth(options) {
    let opts = normalizeOpts(options);
  
    if (opts.output.getWindowSize) {
      return opts.output.getWindowSize()[0] || opts.defaultWidth;
    }
  
    if (opts.tty.getWindowSize) {
      return opts.tty.getWindowSize()[1] || opts.defaultWidth;
    }
  
    if (opts.output.columns) {
      return opts.output.columns;
    }
  
    if (process.env.CLI_WIDTH) {
      let width = parseInt(process.env.CLI_WIDTH, 10);
  
      if (!isNaN(width) && width !== 0) {
        return width;
      }
    }
  
    return opts.defaultWidth;
  }
  
subject: use let