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,當我跑我的項目,我得到這個錯誤:紅寶石錯誤:沒有這樣的文件來加載 - HAML(MissingSourceFile)
C:/InstantRails/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require':
no such file to load -- haml (MissingSourceFile)