title: How to customise the url for the root path?
body: <p>My current root gives a url in the form:
  www.project.com/taskforce</p>
  
  <p>But I would like the url to be:
  www.project.com/taskforce/dashboard</p>
  
  <p>I thought I could achieve this by adding:
  <code>root to: "dashboard#index", path: "taskforce/dashboard"</code></p>
  
  <p>But I get the following error:
  <code>Ambiguous route definition. Both :path and the route path were specified as strings.</code></p>
  
  <p>My routes are as follows:</p>
  
  <pre><code>module TaskForceRoutes
    def self.extended(router)
      router.instance_exec do
        namespace :taskforce do
          root to: "dashboard#index"
          get :new_group_runners, to: "dashboard#new_group_runners", path: "new-group-runners"
          get :members_not_running_much, to: "dashboard#members_not_running_much", path: "members-not-running-much"
          get :attendance_stats, to: "dashboard#attendance_stats", path: "attendance-stats"
          get :area_heroes, to: "dashboard#area_heroes", path: "area-heroes"
          get :resign, to: "dashboard#resign", path: "resign"
        end
      end
    end
  end
  </code></pre>
  
  <p>And I've got a Taskforce::DashboardController</p>