Updated documentation for mode()

added new line to make the note in a new paragraph

Author: alfonsomhc

pandas/core/frame.py

@@ -4414,6 +4414,7 @@ def mode(self, axis=0, numeric_only=False):
         Gets the mode(s) of each element along the axis selected. Empty if nothing
         has 2+ occurrences. Adds a row for each mode per label, fills in gaps
         with nan. 
+        
         Note that there could be multiple values returned for the selected
         axis (when more than one item share the maximum frequency), which is the 
         reason why a dataframe is returned. If you want to impute missing values