old_contents: /**
   * jstransformer-toffee <https://github.com/tunnckoCore/jstransformer-toffee>
   *
   * Copyright (c) 2015 Charlike Mike Reagent, contributors.
   * Released under the MIT license.
   */
  
  'use strict';
  
  var fs = require('fs');
  var path = require('path');
  var toffee = require('toffee');
  var bluebird = require('bluebird');
  var readFile = bluebird.promisify(fs.readFile);
  var readFileSync = fs.readFileSync;
  
  exports.name = 'toffee';
  exports.outputFormat = 'text';
  
  exports.compile = toffee.compile;
  exports.compileFile = function _compileFile(filepath, opts) {
    var input = readFileSync(path.resolve(filepath), 'utf8');
    return exports.compile(input, opts);
  };
  exports.compileFileAsync = function _compileFile(filepath, opts) {
    return readFile(path.resolve(filepath), 'utf8').then(function _then(data) {
      return exports.compile(data, opts)
    });
  };
  exports.render = function _render(str, locals, opts) {
    var renderer = exports.compile(str, opts);
    return renderer(locals);
  };
  exports.renderFile = function _renderFile(filepath, locals, opts) {
    var renderer = exports.compileFile(filepath, opts);
    return renderer(locals);
  };
  exports.renderFileAsync = function _renderFileAsync(filepath, locals, opts) {
    var renderer = exports.compileFileAsync(filepath, opts);
  
    return renderer.then(function(compiler) {
      return compiler(locals);
    })
  };
  
new_contents: /**
   * jstransformer-toffee <https://github.com/tunnckoCore/jstransformer-toffee>
   *
   * Copyright (c) 2015 Charlike Mike Reagent, contributors.
   * Released under the MIT license.
   */
  
  'use strict';
  
  var fs = require('fs');
  var path = require('path');
  var toffee = require('toffee');
  var bluebird = require('bluebird');
  var readFile = bluebird.promisify(fs.readFile);
  var readFileSync = fs.readFileSync;
  
  exports.name = 'toffee';
  exports.outputFormat = 'html';
  
  exports.compile = toffee.compile;
  exports.compileFile = function _compileFile(filepath, opts) {
    var input = readFileSync(path.resolve(filepath), 'utf8');
    return exports.compile(input, opts);
  };
  exports.compileFileAsync = function _compileFile(filepath, opts) {
    return readFile(path.resolve(filepath), 'utf8').then(function _then(data) {
      return exports.compile(data, opts)
    });
  };
  exports.render = function _render(str, locals, opts) {
    var renderer = exports.compile(str, opts);
    return renderer(locals);
  };
  exports.renderFile = function _renderFile(filepath, locals, opts) {
    var renderer = exports.compileFile(filepath, opts);
    return renderer(locals);
  };
  exports.renderFileAsync = function _renderFileAsync(filepath, locals, opts) {
    var renderer = exports.compileFileAsync(filepath, opts);
  
    return renderer.then(function(compiler) {
      return compiler(locals);
    })
  };
  
subject: change `outputFormat` to `html`