restore output format of --output_alignment
restore output format of --output_alignment

rsennrich/nematus,EdinburghNLP/nematus,cshanbo/nematus,EdinburghNLP/nematus,EdinburghNLP/nematus,EdinburghNLP/nematus,Proyag/nematus,Proyag/nematus,rsennrich/nematus,cshanbo/nematus,Proyag/nematus,Proyag/nematus,cshanbo/nematus,rsennrich/nematus,rsennrich/nematus,cshanbo/nematus,EdinburghNLP/nematus,rsennrich/nematus,cshanbo/nematus,Proyag/nematus,rsennrich/nematus,Proyag/nematus,cshanbo/nematus,EdinburghNLP/nematus