Appraisals in msgr-1.3.2 vs Appraisals in msgr-1.4.0

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
-# -*- mode: ruby -*-
 
+# vim: ft=ruby
+
 appraise 'rails-5.2' do
   gem 'rails', '~> 5.2.0'
 end
 
 appraise 'rails-6.0' do
@@ -11,8 +12,12 @@
 
 appraise 'rails-6.1' do
   gem 'rails', '~> 6.1.0'
 end
 
-appraise 'rails-master' do
+appraise 'rails-7.0' do
+  gem 'rails', '~> 6.1.0'
+end
+
+appraise 'rails-head' do
   gem 'rails', git: 'https://github.com/rails/rails', require: 'rails'
 end