fix doc and example code of huber_loss and npair_loss#27678
Merged
jzhang533 merged 4 commits intoPaddlePaddle:developfrom Oct 8, 2020
Merged
fix doc and example code of huber_loss and npair_loss#27678jzhang533 merged 4 commits intoPaddlePaddle:developfrom
jzhang533 merged 4 commits intoPaddlePaddle:developfrom