fix summary is not in 1 line

Author: cloudboat

pandas/core/arrays/datetimelike.py

@@ -908,7 +908,6 @@ def freqstr(self) -> str | None:
     def inferred_freq(self) -> str | None:
         """
         Tries to return a string representing a frequency generated by infer_freq.
-
         Returns None if it can't autodetect the frequency.
 
         See Also