title: no such file to load -- rdoc/task
body: <p>When I run</p>
  
  <pre><code>rake db:create
  </code></pre>
  
  <p>I receive this error</p>
  
  <pre><code>rake aborted!
  no such file to load -- rdoc/task
  
  (See full trace by running task with --trace)
  </code></pre>
  
  <p>Here is the --trace</p>
  
  <pre><code>/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
  /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
  /home/tpeg/rails_apps/Test/Rakefile:8
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load_rakefile'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:495:in `raw_load_rakefile'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:78:in `load_rakefile'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:77:in `load_rakefile'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:61:in `run'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:59:in `run'
  /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/bin/rake:32
  /usr/bin/rake:19:in `load'
  /usr/bin/rake:19
  </code></pre>
  
  <p>I have rake 0.9.2 and rdoc 3.11 installed. I am running these commands in my app's directory.</p>