The literary world is known more for arch feuds between great minds than solidarity among fellow scribes, but recent suggestions that Ian McEwan “copied” from another author have not only rallied support from his contemporaries, but brought one of their most famously reclusive brethren to the barricades as well.Thomas Pynchon, the laconic American author of Gravity’s Rainbow and Against the Day, yesterday made the unusual move of breaking his customary silence, and came out in support ofMcEwan who has been accused of using elements of another writer’s work in his Booker prize-nominated 2002 work Atonement…