old_contents: /*
   * grunt-contrib-coffee
   * http://gruntjs.com/
   *
   * Copyright (c) 2012 Eric Woroshow, contributors
   * Licensed under the MIT license.
   */
  
  module.exports = function(grunt) {
    'use strict';
  
    grunt.registerMultiTask('coffee', 'Compile CoffeeScript files into JavaScript', function() {
      var path = require('path');
  
      var options = this.options({
        bare: false,
        separator: grunt.util.linefeed
      });
  
      if (options.basePath || options.flatten) {
        grunt.fail.warn('Experimental destination wildcards are no longer supported. please refer to README.');
      }
  
      grunt.verbose.writeflags(options, 'Options');
  
      this.files.forEach(function(f) {
        var output = f.src.filter(function(filepath) {
          // Warn on and remove invalid source files (if nonull was set).
          if (!grunt.file.exists(filepath)) {
            grunt.log.warn('Source file "' + filepath + '" not found.');
            return false;
          } else {
            return true;
          }
        }).map(function(filepath) {
          return compileCoffee(filepath, options);
        }).join(grunt.util.normalizelf(options.separator));
  
        if (output.length < 1) {
          grunt.log.warn('Destination not written because compiled files were empty.');
        } else {
          grunt.file.write(f.dest, output);
          grunt.log.writeln('File ' + f.dest + ' created.');
        }
      });
    });
  
    var compileCoffee = function(srcFile, options) {
      options = grunt.util._.extend({filename: srcFile}, options);
  
      if (require('path').extname(srcFile) === '.litcoffee') {
        options.literate = true;
      }
  
      var srcCode = grunt.file.read(srcFile);
  
      try {
        return require('coffee-script').compile(srcCode, options);
      } catch (e) {
        grunt.log.error(e);
        grunt.fail.warn('CoffeeScript failed to compile.');
      }
    };
  };
  
new_contents: /*
   * grunt-contrib-coffee
   * http://gruntjs.com/
   *
   * Copyright (c) 2012 Eric Woroshow, contributors
   * Licensed under the MIT license.
   */
  
  module.exports = function(grunt) {
    'use strict';
  
    grunt.registerMultiTask('coffee', 'Compile CoffeeScript files into JavaScript', function() {
      var options = this.options({
        bare: false,
        separator: grunt.util.linefeed
      });
  
      if (options.basePath || options.flatten) {
        grunt.fail.warn('Experimental destination wildcards are no longer supported. please refer to README.');
      }
  
      grunt.verbose.writeflags(options, 'Options');
  
      this.files.forEach(function(f) {
        var output = f.src.filter(function(filepath) {
          // Warn on and remove invalid source files (if nonull was set).
          if (!grunt.file.exists(filepath)) {
            grunt.log.warn('Source file "' + filepath + '" not found.');
            return false;
          } else {
            return true;
          }
        }).map(function(filepath) {
          return compileCoffee(filepath, options);
        }).join(grunt.util.normalizelf(options.separator));
  
        if (output.length < 1) {
          grunt.log.warn('Destination not written because compiled files were empty.');
        } else {
          grunt.file.write(f.dest, output);
          grunt.log.writeln('File ' + f.dest + ' created.');
        }
      });
    });
  
    var compileCoffee = function(srcFile, options) {
      options = grunt.util._.extend({filename: srcFile}, options);
  
      if (require('path').extname(srcFile) === '.litcoffee') {
        options.literate = true;
      }
  
      var srcCode = grunt.file.read(srcFile);
  
      try {
        return require('coffee-script').compile(srcCode, options);
      } catch (e) {
        grunt.log.error(e);
        grunt.fail.warn('CoffeeScript failed to compile.');
      }
    };
  };
  
subject: Remove unused path variable.