If people's hopes of coding bug-free code in Python 2 actually panned out then they would have bug free code thus when they port their code to python 3, the u

If people's hopes of coding bug-free code in Python 2 actually panned out then they would have bug free code thus when they port their code to python 3, the unicode changes would not reveal latent (existing) bugs thus they would not blog about or tell people about said bugs, hence the author of that sentence would not have heard about such bugs moral of the story: Python 2 hides certain kind of unicode related bugs that are not exposed until you port to Python 3.