I keep the trailing dot only. This is so that if I want to remove the sentence that's starting after (it's usually {.i} after), I don't have to move the dot.
e.g. .i do me la .brodas. i mi co'e
If the separation between the two dots is greater, then I'll write them both. The rationale is that if it's in the same paragraph, it's meant to be read together, so putting both dots is unnecessary, but if there's some kind of more significant separation, then someone could presumably start reading after the separation.
.i mi'e la tsani mu'o