fix loss normalization for ddp training

haoneng.lhn

2023-12-08 acb9a0fec8d8a4dabeedcbb8e08c26f66d7083f0

 runtime/onnxruntime/src/vocab.cpp

@@ -199,7 +199,7 @@
        }
    }

    if (language == "en-bpe" and combine != ""){
    if (language == "en-bpe" && combine != ""){
        combine = WordFormat(combine);
        if (words.size() != 0){
            combine = " " + combine;