Update frequencies.py

Removed empty line and deleted spaces.

Author: Remit

pandas/tseries/frequencies.py

@@ -139,13 +139,12 @@ def infer_freq(index, warn: bool = True) -> Optional[str]:
         If the index is not datetime-like.
     ValueError
         If there are fewer than three values.
-        
+
     Examples
     --------
     >>> idx = pd.date_range(start = '2020/12/01', end = '2020/12/30', periods = 30)
     >>> pd.infer_freq(idx)
     'D'
-            
     """
     import pandas as pd