Update README.md

README.md

 # BERT-pytorch
 
-Repeted by pytorch, without pre-train.
-Now, could be trained by mask word2idx.
-And, I am foucsing on the conversation training.
+Repeted by pytorch, without pre-train.  
+Now, could be trained by mask word2idx.      
+And, I am foucsing on the conversation training.    
 
 # How to use