下面是我的 gemfile 文件，请问有重复 require 的吗？
source 'https://rubygems.org'
gem 'rails', '3.2.9'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'sqlite3'
gem "ransack", :git => "git://github.com/ernie/ransack.git" # Track git repo
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
gem 'jquery-datatables-rails', :git => "git://github.com/rweng/jquery-datatables-rails.git"
gem 'jquery-ui-rails'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'will_paginate'
gem 'jquery-rails'
gem 'delayed_job_active_record'
gem 'daemons'
`# To use ActiveModel has_secure_password
gem 'bcrypt-ruby', '~> 3.0.0'``
`# To use Jbuilder templates for JSON
gem 'jbuilder'`
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
#To use debugger
gem 'debugger'
这是 application.js 文件
//= require jquery
//= require jquery_ujs
//= require layer
//= require dataTables/jquery.dataTables
//= require_tree .
