Say load spec_helper first which is easier

spec/spec_helper.rb

@@ -3,7 +3,7 @@
 if $".include?(File.expand_path('fast_spec_helper.rb', __dir__))
   warn 'Detected fast_spec_helper is loaded first than spec_helper.'
   warn 'If running test files using both spec_helper and fast_spec_helper,'
-  warn 'make sure test file with spec_helper is loaded first.'
+  warn 'make sure spec_helper is loaded first, or run rspec with `-r spec_helper`.'
   abort 'Aborting...'
 end