old_contents: import gulp from 'gulp';
  import del from 'del';
  
  gulp.task('clean', cb => {
  	del([
  		'dist',
  		'tmp',
  	], cb);
  });
  
new_contents: import gulp from 'gulp';
  import del from 'del';
  
  gulp.task('clean', cb => {
  	del([
  		'dist/*.*',
  		'tmp',
  	], cb);
  });
  
subject: Fix clean command