irb(main):024:0> s = "asa".html_safe?
                 => false
                  irb(main):025:0> s = "asa".html_safe
                  => "asa"
                  irb(main):026:0> s
                  => "asa"
                 irb(main):027:0> s.clear.html_safe?
                  => true

                irb(main):028:0> s
                => ""
               irb(main):029:0> s.byteslice(2).html_safe?
               => false