big doc update [WIP]

README.md

@@ -119,6 +119,7 @@ tokenizer = tokenizer_class.from_pretrained(pretrained_weights)
 ```
 
 ## Quick tour of the fine-tuning/usage scripts
+
 The library comprises several example scripts with SOTA performances for NLU and NLG tasks:
 
 - `run_glue.py`: an example fine-tuning Bert, XLNet and XLM on nine different GLUE tasks (*sequence-level classification*)