My Sweet Baby Girl (potted) has been happily growing for about a month or so. (We're in Central Florida.) I've recently noticed that some of the leaves (mostly near the bottom) have these white squiggly lines on them. The lines are almost inside the leaf, not on top of it or on the outside. One end is thicker and the other thinner. It really looks like a path left by a bug or something.

What would this be?