It’s okay to feel a little trepidation before going to see The Peanuts Movie. After all, it was only a couple of months ago that the powers that be decided what the world really needed was a Muppets television show full of penis jokes and pessimistic cruelty. If the folks entrusted with Jim Henson’s creations were willing to submit Kermit and Fozzy to that kind of butchery, why should Charlie Brown and Snoopy be any safer? Well, let those trepidations slide away, because, to paraphrase Charles M. Schulz, happiness is a film about a warm puppy. The best way...