title: Getting error in Hartl's tutorial running "bundle exec rspec spec/requests/static_pages_spec.rb"
body: <p>I'm learning Ruby from Michael Hartl's tutorial. I'm following the steps one by one, but I can't get passed this one. When I input "bundle exec rspec spec/requests/static_pages_spec.rb" I get a very long error response as opposed to a simple "1 example, 0 failures". I changed the necessary code in the static pages directories and I'm fairly confident the code is correct as I simply copied and pasted. The error message is this:</p>
  
  <pre><code>/Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/nokogiri-1.6.0/lib/nokogiri.rb:28:in `require': dlopen(/Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/nokogiri-1.6.0/lib/nokogiri/nokogiri.bundle, 9): Library not loaded: /Users/marlon/.bundler/tmp/1219/gems/nokogiri-1.6.0/ports/i686-apple-darwin11/libxml2/2.8.0/lib/libxml2.2.dylib (LoadError)
    Referenced from: /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/nokogiri-1.6.0/lib/nokogiri/nokogiri.bundle
    Reason: Incompatible library version: nokogiri.bundle requires version 11.0.0 or later, but libxml2.2.dylib provides version 10.0.0 - /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/nokogiri-1.6.0/lib/nokogiri/nokogiri.bundle
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/nokogiri-1.6.0/lib/nokogiri.rb:28:in `&lt;top (required)&gt;'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/capybara-1.1.2/lib/capybara.rb:2:in `require'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/capybara-1.1.2/lib/capybara.rb:2:in `&lt;top (required)&gt;'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
      from /Users/marlon/rails_projects/sample_app/config/application.rb:7:in `&lt;top (required)&gt;'
      from /Users/marlon/rails_projects/sample_app/config/environment.rb:2:in `require'
      from /Users/marlon/rails_projects/sample_app/config/environment.rb:2:in `&lt;top (required)&gt;'
      from /Users/marlon/rails_projects/sample_app/spec/spec_helper.rb:3:in `require'
      from /Users/marlon/rails_projects/sample_app/spec/spec_helper.rb:3:in `&lt;top (required)&gt;'
      from /Users/marlon/rails_projects/sample_app/spec/requests/static_pages_spec.rb:1:in `require'
      from /Users/marlon/rails_projects/sample_app/spec/requests/static_pages_spec.rb:1:in `&lt;top (required)&gt;'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `load'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `block in load_spec_files'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `map'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `load_spec_files'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/command_line.rb:22:in `run'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:69:in `run'
      from /Users/marlon/.rvm/gems/ruby-1.9.2-p320/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:8:in `block in autorun'
  dyn172-30-28-254:sample_app marlon$
  </code></pre>
  
  <p>Please let me know what I can do to fix this. I appreciate all the help, thanks in advance!</p>