CoverMe with HtmlAndConsole formatter for RSpec, and no browser window opening

gistfile1.rb

if ENV['COVERAGE']
  require 'cover_me'
  class CoverMe::HtmlAndConsoleFormatter < CoverMe::HtmlFormatter
    def format_index(index)
      super
      puts "\n\n[CoverMe] Current coverage: #{index.percent_tested}%"
    end
  end

  CoverMe.config do |c|
    c.formatter = CoverMe::HtmlAndConsoleFormatter

    c.at_exit = lambda {}
  end

  RSpec.configure do |config|
    config.after(:suite) do
      CoverMe.complete!
    end
  end
end