:text{text="  "}Two leading spaces held, and one text node split:text{text="\n"}over two lines.

Trailing space held:text{text=" "}

:text{text="\t"}Tabbed at the block edge.

Space before the break:text{text=" "}\
survives.

Space after the break\
:text{text=" "}survives too.

Kept _:text{text=" "}inside:text{text=" "}_, exactly.