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我跟随Hartl的Ruby on Rails指南，并且我正在尝试设置“guard”和“spork”来自动执行“rspec”测试。当我尝试运行 bundle exec rspec spec/requests/static_pages_spec.rbRails的rspec问题（无法加载这样的文件--b（LoadError））
我收到以下错误：
/home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:434:in `require': cannot load such file -- b (LoadError)
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:434:in `block in requires='
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:434:in `map'
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:434:in `requires='
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration_options.rb:20:in `block in configure'
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration_options.rb:19:in `each'
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/configuration_options.rb:19:in `configure'
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/command_line.rb:21:in `run'
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:69:in `run'
from /home/throne/.rvm/gems/[email protected]/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:8:in `block in autorun'
我看了看其他的解决方案的人谁也有类似的各种问题（之类的东西重新安装宝石，使用绝对路径和固定DO /目标文件中的结尾语句），但他们都没有改变这个问题。谢谢你的帮助！