Add example_status_persistence_file_path generated spec_helper.rb

Author: myronmarston

lib/rspec/core/project_initializer/spec/spec_helper.rb

@@ -50,6 +50,11 @@
   config.filter_run :focus
   config.run_all_when_everything_filtered = true
 
+  # Allows RSpec to persist some state between runs in order to support
+  # the `--only-failures` and `--next-failure` CLI options. We recommend
+  # you configure your source control system to ignore this file.
+  config.example_status_persistence_file_path = "spec/examples.txt"
+
   # Limits the available syntax to the non-monkey patched syntax that is
   # recommended. For more details, see:
   #   - http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax