I didn't even try "goes the weasle" because of it.
I dont know the rhyme but heard of pop goes the weasel, so that is what immediately popped into my head. But then saw a single line, so that couldnt be the answer. I see no reason for it to be single line.
some complete guesses were nesr misses though ! Six pennies instead of 5 farthings. Little dogs tails instead of puppy dogs