rspec/rspec-core — pull request #681 by twe4ked (2012-09-16 06:24:05+00:00)
Title: Pluralize 'second' in RSpec::Core::Formatters::Helpers#format_duration

I also had to add `.to_f` to the pluralize method so it handles strings, I can split that into a separate commit if you like. Cheers.