# File lib/rspec/core/configuration.rb, line 37
      def initialize
        @color_enabled = false
        self.include_or_extend_modules = []
        self.files_to_run = []
        self.backtrace_clean_patterns = [
          /\/lib\d*\/ruby\//,
          /bin\//,
          /gems/,
          /spec\/spec_helper\.rb/,
          /lib\/rspec\/(core|expectations|matchers|mocks)/
        ]

        filter_run_excluding(
          :if     => lambda { |value, metadata| metadata.has_key?(:if) && !value },
          :unless => lambda { |value| value }
        )
      end