old_contents: /*
   * grunt-contrib-mincss
   * http://gruntjs.com/
   *
   * Copyright (c) 2012 Tim Branyen, contributors
   * Licensed under the MIT license.
   */
  
  'use strict';
  
  module.exports = function(grunt) {
  
    grunt.registerMultiTask('mincss', 'Minify CSS files', function() {
      var srcFiles, sourceCode, sourceCompressed;
      var taskOutputMin = [];
      var taskOutputMax = [];
  
      var options = this.options();
      grunt.verbose.writeflags(options, 'Options');
  
      var files = grunt.file.expandFiles(this.file.src);
      files.forEach(function(file) {
        sourceCode = grunt.file.read(file);
        sourceCompressed = minifyCSS(sourceCode);
  
        taskOutputMin.push(sourceCompressed);
        taskOutputMax.push(sourceCode);
      });
  
      if (taskOutputMin.length > 0) {
        taskOutputMin = taskOutputMin.join('');
        taskOutputMax = taskOutputMax.join('\n');
  
        grunt.file.write(this.file.dest, taskOutputMin);
        grunt.log.writeln('File ' + this.file.dest + ' created.');
  
        minMaxInfo(taskOutputMin, taskOutputMax);
      }
    });
  
    var minifyCSS = function(source) {
      try {
        return require('clean-css').process(source);
      } catch (e) {
        grunt.log.error(e);
        grunt.fail.warn('css minification failed.');
      }
    };
  
    var minMaxGzip = function(src) {
      return src ? require('gzip-js').zip(src, {}) : '';
    };
  
    var minMaxInfo = function(min, max) {
      var gzipSize = String(minMaxGzip(min).length);
      grunt.log.writeln('Uncompressed size: ' + String(max.length).green + ' bytes.');
      grunt.log.writeln('Compressed size: ' + gzipSize.green + ' bytes gzipped (' + String(min.length).green + ' bytes minified).');
    };
  };
  
new_contents: /*
   * grunt-contrib-mincss
   * http://gruntjs.com/
   *
   * Copyright (c) 2012 Tim Branyen, contributors
   * Licensed under the MIT license.
   */
  
  'use strict';
  
  module.exports = function(grunt) {
  
    grunt.registerMultiTask('mincss', 'Minify CSS files', function() {
      var srcFiles, sourceCode, sourceCompressed;
      var taskOutputMin = [];
      var taskOutputMax = [];
  
      var options = this.options();
      grunt.verbose.writeflags(options, 'Options');
  
      var files = this.file.src;
      files.forEach(function(file) {
        sourceCode = grunt.file.read(file);
        sourceCompressed = minifyCSS(sourceCode);
  
        taskOutputMin.push(sourceCompressed);
        taskOutputMax.push(sourceCode);
      });
  
      if (taskOutputMin.length > 0) {
        taskOutputMin = taskOutputMin.join('');
        taskOutputMax = taskOutputMax.join('\n');
  
        grunt.file.write(this.file.dest, taskOutputMin);
        grunt.log.writeln('File ' + this.file.dest + ' created.');
  
        minMaxInfo(taskOutputMin, taskOutputMax);
      }
    });
  
    var minifyCSS = function(source) {
      try {
        return require('clean-css').process(source);
      } catch (e) {
        grunt.log.error(e);
        grunt.fail.warn('css minification failed.');
      }
    };
  
    var minMaxGzip = function(src) {
      return src ? require('gzip-js').zip(src, {}) : '';
    };
  
    var minMaxInfo = function(min, max) {
      var gzipSize = String(minMaxGzip(min).length);
      grunt.log.writeln('Uncompressed size: ' + String(max.length).green + ' bytes.');
      grunt.log.writeln('Compressed size: ' + gzipSize.green + ' bytes gzipped (' + String(min.length).green + ' bytes minified).');
    };
  };
  
subject: remove expandFiles, grunt does it for us now