The long and short of it.  The new Netflix documentary “Marty, Life is Short” covers the life and career of comedian and actor Martin Short, 76, including interviews with Short and his famous pals including Tom Hanks, Steve Martin and the late Catherine O’Hara .  The doc dives into his successful career and major personal tragedies including his wife Nancy Dolman’s death from cancer in 2010.  Martin Short (pictured with Nancy Dolman in an undated photo shown in “Marty, Life Is Short”) has a new documentary about his life. Courtesy of Netflix Short (shown in Marty, Life is Short) talks about his career, life and losses in the new doc. Netflix Though the doc steers clear of things like his rumored romance with Meryl Streep , it’s filled with all the highs and lows Short experienced in his life.…