def to_s
      @threads.map do |t|
        [
          "#{t.name}: status=#{t.status}; alive=#{t.alive?}",
          'Vars: ' + t.thread_variables.map { |v| "#{v}=\"#{t.thread_variable_get(v)}\"" }.join('; '),
          t.backtrace.nil? ? 'NO BACKTRACE' : "  #{t.backtrace.join("\n  ")}"
        ].join("\n")
      end
    end
def to_s
      @threads.map do |t|
        [
          "#{t.name}: status=#{t.status}; alive=#{t.alive?}",
          'Vars: ' + t.thread_variables.map { |v| "#{v}=\"#{t.thread_variable_get(v)}\"" }.join('; '),
          t.backtrace.nil? ? 'NO BACKTRACE' : "  #{t.backtrace.join("\n  ")}"
        ].join("\n")
      end
    end
As a text