Anna Marie de la Fuente Brazilian Petra Costa’s Oscar-nominated documentary “The Edge of Democracy” is getting the sincerest form of flattery this Christmas: a parody.The wildly popular Brazilian comedy troupe, Porta dos Fundos, has decided to make its upcoming annual Christmas Special a satirical take on Costa’s chilling documentary about Brazil’s slide into far-right politics, calling it “The Edge of Theocracy.” And Costa has gleefully agreed to participate in it.In a behind-the-scenes