Fix PEP8 warnings (#157)
Fix PEP8 warnings (#157)

Fix PEP8 warnings: 

* W291 trailing whitespace
* E231 missing whitespace after ':'
* W391 blank line at end of file
mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow