Fix code style

Gemfile

@@ -6,29 +6,41 @@ source 'https://rubygems.org'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'.
 gem 'rails', '~> 5.2.1'
+
 # Use postgresql as the database for Active Record.
 gem 'pg', '>= 0.18', '< 2.0'
+
 # Use Puma as the app server.
 gem 'puma', '~> 3.11'
+
 # Use SCSS for stylesheets.
 gem 'sass-rails', '~> 5.0'
+
 # Use Uglifier as compressor for JavaScript assets.
 gem 'uglifier', '>= 1.3.0'
+
 # See https://github.com/rails/execjs#readme for more supported runtimes.
 # gem 'mini_racer', platforms: :ruby
+
 # Turbolinks makes navigating your web application faster.
 # Read more: https://github.com/turbolinks/turbolinks.
 gem 'turbolinks', '~> 5'
+
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder.
 # gem 'jbuilder', '~> 2.5'
+
 # Use Redis adapter to run Action Cable in production.
 # gem 'redis', '~> 4.0'
+
 # Use ActiveModel has_secure_password.
 # gem 'bcrypt', '~> 3.1.7'
+
 # Use ActiveStorage variant.
 # gem 'mini_magick', '~> 4.8'
+
 # Use Capistrano for deployment.
 # gem 'capistrano-rails', group: :development
+
 # Reduces boot times through caching; required in config/boot.rb.
 gem 'bootsnap', '>= 1.1.0', require: false
 
@@ -52,13 +64,17 @@ group :development do
   # Call 'byebug' anywhere in the code to stop execution
   # and get a debugger console.
   gem 'byebug', platforms: %i[mri mingw x64_mingw]
+
   gem 'listen', '>= 3.0.5', '< 3.2'
+
   # Access an interactive console on exception pages or by calling 'console'
   # anywhere in the code.
   gem 'web-console', '>= 3.3.0'
+
   # Spring speeds up development by keeping your application running
   # in the background. Read more: https://github.com/rails/spring.
   gem 'spring'
+
   gem 'spring-watcher-listen', '~> 2.0.0'
 end