anchor.diff:  
   ### Add a trip day [POST /trips/{tripId}/plan]
   
  -Adds a new empty day to the trip. Only allowed on trips created by the currently authenticated user.
  +Adds a new empty day to the trip.
   
   + Parameters
       + tripId (string) - Trip ID
  
positive.code: 
  ## Trip Ideas [/trips/{tripId}/ideas]
  
  Each trip contains a list of ideas, each of which is a place that the user wants to visit on the trip. The order of the ideas in the array dictates the order they'll be displayed to the user. Each trip only has one list of ideas. Users can add, remove, reorder, or move an idea to the trip plan.
  
  Each trip idea includes the following properties:
  
  
negative.code: 
  ### Update a Trip Entry [PUT /trips/{tripId}/plan/{dayId}/entries/{entryId}]
  
  Updates the state of a trip entry. Can update the position of the entry in the list (`index`), the day that the entry belongs to, the status, and the comment. Example use cases include checking in at a place, reordering the entry, and moving the entry to another day.
  
  If the API call asks to move the entry to another day, but `index` is not provided, the backend adds the entry to the end of the entries for the new day.
  
  