app/models/room.rb
Missing magic comment `# frozen_string_literal: true`.# == Schema Information## Table name: rooms## id :integer not null, primary key# name :string# rank :integer# created_at :datetime not null# updated_at :datetime not null# # frozen_string_literal: trueAdd an empty line after magic comments.class Room < ApplicationRecord include CheckInnable validates :rank, presence: true, inclusion: 0...100 validates :name, presence: true, uniqueness: true, length: { in: 4...50 }end