formatting fix again?

Author: paulgb

Diff for: README.md

@@ -19,6 +19,7 @@ Import what you need from the `sklearn_pandas` package. The choices are:
 * `DataFrameMapper`, a class for mapping pandas data frame columns to different sklearn transformations
 * `cross_val_score`, similar to `sklearn.cross_validation.cross_val_score` but working on pandas DataFrames
 
+For this demonstration, we will import both.
 
     >>> from sklearn_pandas import DataFrameMapper, cross_val_score