Choir Boy ****
By: Isa Goldberg January 16, 2019: There is a lot less violence in Tarell Alvin McCraney's Choir Boy at the Manhattan Theater Club, than there is in the Academy Awarding winning movie, adapted from his play, In Moonlight Black Boys Look Blue. Still, the stripped-down version of it that we see in this coming-of-age drama, equally challenges the way we think.  Its language is that of spirituals, but not just the o…