\x09 \x09 \x09\x09 \x09 \x09 \x09\x09 \x09 \x09 \x09 \x09\x09\x09\x09 \x09 \x09 \x09\x09\x09\x09 \x09 \x09\x09 \x09 \x09\x09 \x09 \x09 \x09 \x09 \x09 \x09\x09\x09\x09 \x09\x09\x09\x09 \x09 \x09 \x09 \x09\x09\x09 \x09 \x09\x09
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
mark null push +10(4b) push -1(1b) push +0(0b) dup mark +0(0b) swap copy +3(2b) mul add push +47(6b) dup dup getc retr sub dup jneg +0(0b) geti mark -0(0b) swap push +1(1b) add swap push +15(4b) retr div dup push +1(1b) add jneg -0(0b) pop puti putc jump null