SEASON PREMIERE: Issa Rae, the star and co-creator of this smartly self-aware sitcom, has not only made a worthy spiritual successor to HBO’s Girls – young women, as friends, trying to cope with life and love in the big city – but done it with two significant tweaks. The city is L.A., not New York, and Issa and her girls are black, not white. Do those changes make a difference? When the writing and acting is in such good hands, absolutely – and here comes Season 2.