message: [docstring] Refining warm_up_cache comment
diff: @@ -1677,7 +1677,10 @@ class Superset(BaseSupersetView):
  @has_access_api
  @expose("/warm_up_cache/", methods=['GET'])
  def warm_up_cache(self):
  - """Warms up the cache for the slice or table."""
  + """Warms up the cache for the slice or table.
  +
  + Note for slices a force refresh occurs.
  + """
  slices = None
  session = db.session()
  slice_id = request.args.get('slice_id')
  