Fix some grouping ::: issues

Author: Susan Vanderplas

_freeze/part-gen-prog/03-data-struct/execute-results/html.json

@@ -267,6 +267,7 @@ print(digits_pi)
 
 The Series object has a list of labels in the first printed column, and a list of values in the second. 
 If we want, we can specify the labels manually to use as e.g. plot labels later:
+
 ```{python series-pandas-3}
 import pandas as pd
 weekdays = pd.Series(['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'], index = ['S', 'M', 'T', 'W', 'R', 'F', 'Sat'])
@@ -286,6 +287,7 @@ weekdays.index[6] = 'Z' # you can't assign things to the index to change it
 
 weekdays
 ```
+
 :::
 
 [^05-vectors-2]: A similar system exists in R libraries, but R doesn't handle multiple libraries having the same function names well, which leads to all sorts of confusion. At least python is explicit about it.