```ruby
module Rake

  # The NameSpace class will lookup task names in the the scope
  # defined by a +namespace+ command.
  #
  class NameSpace

    # Create a namespace lookup object using the given task manager
    # and the list of scopes.
    def initialize(task_manager, scope_list)
      @task_manager = task_manager
      @scope = scope_list.dup
    end

    # Lookup a task named +name+ in the namespace.
    def [](name)
      @task_manager.lookup(name, @scope)
    end

    ##
    # The scope of the namespace (a LinkedList)

    def scope
      @scope.dup
    end

    # Return the list of tasks defined in this and nested namespaces.
    def tasks
      @task_manager.tasks_in_scope(@scope)
    end
  end
end
```

Clean up documentation and a typo
user
```ruby
module Rake

  ##
  # The NameSpace class will lookup task names in the scope defined by a
  # +namespace+ command.

  class NameSpace

    ##
    # Create a namespace lookup object using the given task manager
    # and the list of scopes.

    def initialize(task_manager, scope_list)
      @task_manager = task_manager
      @scope = scope_list.dup
    end

    ##
    # Lookup a task named +name+ in the namespace.

    def [](name)
      @task_manager.lookup(name, @scope)
    end

    ##
    # The scope of the namespace (a LinkedList)

    def scope
      @scope.dup
    end

    ##
    # Return the list of tasks defined in this and nested namespaces.

    def tasks
      @task_manager.tasks_in_scope(@scope)
    end
  end
end
```
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