old_contents: /*jslint node: true, nomen: true, sloppy: true*/
  
  var cp = require('child_process'),
      fs = require('fs'),
      tests,
      command,
      exitCode = 0;
  
  // Execute requirejs optimizer
  cp.exec('node ' + __dirname + '/../vendor/r.js/dist/r.js -o ' + __dirname + '/Classify.build.js', function (error, stdout, stderr) {
  
      // Print success or error
      if (error !== null) {
          console.error(stderr);
          exitCode = 1;
      } else {
          console.log(stdout);
      }
  
      // Remove other files
      var files = fs.readdirSync(__dirname + '/../dist'),
          distDir = __dirname + '/../dist/';
  
      files.forEach(function (file) {
  
          var code;
  
          if (file.substr(file.length - 3) === ".js" && file !== "Classify.js") {
              console.log("Deleting " + file);
              code = fs.unlinkSync(distDir + file);
  
              if (code === 0) {
                  exitCode = 1;
              }
          }
      });
  
      // Exit if something went badly
      if (exitCode) {
          process.exit(exitCode);
      }
  
      // Run tests
      command = 'mocha -R list ' + __dirname + '/../test/Classify.test.js';
  
      if (process.platform === 'win32') {
          tests = cp.spawn('cmd', ['/s', '/c', command], { customFds: [0, 1, 2] });
      } else {
          tests = cp.spawn('sh', ['-c', command], { customFds: [0, 1, 2] });
      }
      tests.on('exit', function (code) {
  
          if (code !== 0) {
              process.exit(1);
          } else {
              process.exit(0);
          }
      });
  });
new_contents: /*jslint node: true, nomen: true, sloppy: true*/
  
  var cp = require('child_process'),
      fs = require('fs'),
      tests,
      command,
      exitCode = 0;
  
  // Execute requirejs optimizer
  cp.exec('node ' + __dirname + '/../vendor/r.js/dist/r.js -o ' + __dirname + '/Classify.build.js', function (error, stdout, stderr) {
  
      // Print success or error
      if (error !== null) {
          console.error(stderr);
          exitCode = 1;
      } else {
          console.log(stdout);
      }
  
      // Remove other files
      var files = fs.readdirSync(__dirname + '/../dist'),
          distDir = __dirname + '/../dist/';
  
      files.forEach(function (file) {
  
          var code;
  
          if (file.substr(file.length - 3) === '.js' && file !== 'Classify.js') {
              console.log('Deleting ' + file);
              code = fs.unlinkSync(distDir + file);
  
              if (code === 0) {
                  console.error('Unable to delete file.');
                  exitCode = 1;
              }
          }
      });
  
      // Exit if something went badly
      if (exitCode) {
          process.exit(exitCode);
      }
  
      // Run tests
      command = 'mocha -R list ' + __dirname + '/../test/Classify.test.js';
  
      if (process.platform === 'win32') {
          tests = cp.spawn('cmd', ['/s', '/c', command], { customFds: [0, 1, 2] });
      } else {
          tests = cp.spawn('sh', ['-c', command], { customFds: [0, 1, 2] });
      }
      tests.on('exit', function (code) {
  
          if (code !== 0) {
              process.exit(1);
          } else {
              process.exit(0);
          }
      });
  });
subject: Add error message and fix CS.