The "correction" that the grammar troll has condescendingly !$%*!$%*!$ makes the sentence sound even worse. I'm pretty sure the guy / dame didn't stay awake through his / her semantics classes. And, as pointed out already, his / her unwarranted hyphenation casts a cloud of doubt over his / her efforts on English lessons as well.
Actually red33410, he didn't "split-the-predicate" as you put it. Both sentences are complete. Had he left out the "it's" in the second sentence, I would agree with you, but he didn't. The only real grammatical error that could possibly be argued is that the clause is subordinate, but even that is a stretch.