(HTML
(HEAD
)HEAD
(BODY
Aonload alert(1) // comment alert(2)
"\n
(DIV
Aall 2s 2t 2n|2s
Aleading-newline 2n
Aleading-space 2s
Aleading-tab 2t
Atrailing-newline 2n
Atrailing-space 2s
Atrailing-tab 2t
)DIV
)BODY
)HTML
