# File lib/rspec/core/formatters/base_formatter.rb, line 116
        def read_failed_line(exception, example)
          unless matching_line = find_failed_line(exception.backtrace, example.file_path)
            return "Unable to find matching line from backtrace"
          end

          file_path, line_number = matching_line.match(/(.+?):(\d+)(|:\d+)/)[1..2]

          if File.exist?(file_path)
            open(file_path, 'r') { |f| f.readlines[line_number.to_i - 1] }
          else
            "Unable to find #{file_path} to read failed line"
          end
        end