title: Are rake task arguments immutable?
body: <p>I want to modify the value of a task arguments (e.g. I want the argument to become a symbol). But it seems that the rake task arguments are immutable, is this correct?</p>
  
  <pre><code>  task :my_task,[:some_arg,:another_arg]  do |cmd,args|
      puts args[:some_arg].class
      args[:some_arg]=args[:some_arg].to_sym
      puts args[:some_arg].class
    end
  </code></pre>