Note: per CSS, the absolute box's sizing is explicitly UB, apparently to
accommodate for Gecko's broken rendering. We follow Blink.


test test [48;2;255;0;0m2t 2t [49mestadsfasdf
test test [48;2;255;0;0m2     [49mest
[48;2;0;0;255masdfasd fa[48;2;255;0;0m      [48;2;0;0;255m                                                                [49m
          [48;2;255;0;0m      [49m
          [48;2;255;0;0m      [49m
          [48;2;255;0;0m      [49m
test      [48;2;255;0;0m      [49m