The I-FLOOD routine always begins by printing a blank line, probably so that none of the other cases has to. But it's not certain that it will actually print a message. So if you cast PULVER on the river and then just walk away, a few moves later you will get two blank lines before the prompt.
The
I-FLOODroutine always begins by printing a blank line, probably so that none of the other cases has to. But it's not certain that it will actually print a message. So if you cast PULVER on the river and then just walk away, a few moves later you will get two blank lines before the prompt.This is similar to https://github.com/the-infocom-files/planetfall/issues/18