Why might a blank line appear in the console output?

This really doesn't matter (I don't think) but it just started... maybe new with 1.9.1? Or maybe somehow I did it? So I'm curious....

I look at the stuff I print() to the console, and there are a few blank lines that didn't used to be there.

I checked my Lua code: every print() starts with hard-coded visible text, so it can't be blank. And none of them print a line break, nor does any variable in the app ever contain one.

Any thoughts?