There’s a high level of cool playing off a serious case of regret in the always engaging graphic novel, “Pretentious Record Store Guy,” by Carlos Gabriel Ruiz. As a fellow traveler in cartooning as well as hipster preoccupations, I can say that Ruiz has concocted something pretty special. It’s like he’s willed to life a particular view with all its quirky faults. Once the shark stops, he is doomed. Ruiz finds a way to keep that shark moving.