Fixing typo in NMT tutorial
Fixing typo in NMT tutorial

liyi193328/seq2seq,google/seq2seq,liyi193328/seq2seq,google/seq2seq,liyi193328/seq2seq,shashankrajput/seq2seq,shashankrajput/seq2seq,chunfengh/seq2seq,chunfengh/seq2seq,chunfengh/seq2seq,liyi193328/seq2seq,google/seq2seq,google/seq2seq,shashankrajput/seq2seq,liyi193328/seq2seq,shashankrajput/seq2seq,chunfengh/seq2seq