Apply automatic rubocop fixes

spec/spec_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file was generated by the `rails generate rspec:install` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause this
@@ -16,8 +18,8 @@
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
 
 unless RUBY_PLATFORM == 'java'
-    require 'simplecov'
-    SimpleCov.start('rails')
+  require 'simplecov'
+  SimpleCov.start('rails')
 end
 
 require 'webmock/rspec'