Use progress format

Author: Jônatas Davi Paganini

experiments/replace_create_with_build_stubbed.rb

@@ -6,5 +6,5 @@
   lookup 'spec'
   search '(block (send nil let (sym _)) (args) $(send nil create))'
   edit { |_, (create)| replace(create.loc.selector, 'build_stubbed') }
-  policy { |new_file| system("bin/spring rspec --fail-fast #{new_file}") }
+  policy { |new_file| system("bin/spring rspec --format progress --fail-fast #{new_file}") }
 end