fix equality comparison bug in HumanEdits caught by 2.10 compiler
fix equality comparison bug in HumanEdits caught by 2.10 compiler

factorie/factorie,asubbaswamy/factorie,patverga/factorie,digitalreasoning/factorie-scala-210,strubell/factorie,joprice/factorie,melisabok/factorie,hlin117/factorie,malcolmgreaves/factorie,Craigacp/factorie,pogren-oracle/factorie,zxsted/factorie