Exercises of chapter seven
	modified:   .rspec
	modified:   Gemfile
	modified:   app/helpers/users_helper.rb
	modified:   app/views/layouts/application.html.erb
	modified:   app/views/users/show.html.erb
	modified:   config/application.rb
	modified:   config/locales/en.yml
	modified:   spec/requests/user_pages_spec.rb