Even in death, goods and services must still be exchanged. So goes the American dream. At the heart of August Wilson’s “Two Trains Running,” now in repertory with “The Comedy of Errors” at American Conservatory Theater, lies a perennial struggle between desire and reality and a dynamic exploration of the circumstances that often prevent the two from meeting. A.C.T.'s production of Wilson’s classic play is staged by the repertory staff without bombast or flair, putting up the Pittsburgh-set play almost exactly as the late playwright described in his original text, wisely ceding the stage to said text and its performers. Wilson’s words can easily astonish, but it’s this ensemble that makes this production a can’t-miss. The Acting Company digs into Wilson’s play – set in the 1960s during the Civil Rights movement, after the murders of Malcolm X and Martin Luther King Jr. – with gusto. It’s easy to see how much the company relishes inhabiting a cast of characters this layered, as each me...