    # File lib/spec/runner/formatter/base_text_formatter.rb, line 28
            def dump_failure(counter, failure)
              @output.puts
              @output.puts "#{counter.to_s})"
              @output.puts colourise("#{failure.header}\n#{failure.exception.message}", failure)
              @output.puts format_backtrace(failure.exception.backtrace)
              @output.flush
            end