9203 REQUEST SQUASHED - DOCS: doc string edited pandas/core/frame.duplicated()

Redefined `take_last` variable in doc string. Original definition only
made sense for drop_duplicates()

Author: robertdavidwest

pandas/core/frame.py

@@ -2726,7 +2726,8 @@ def duplicated(self, subset=None, take_last=False):
             Only consider certain columns for identifying duplicates, by
             default use all of the columns
         take_last : boolean, default False
-            Take the last observed row in a row. Defaults to the first row
+            For a set of distinct duplicate rows, flag all but the last row as 
+            duplicated. Default is for all but the first row to be flagged            
         cols : kwargs only argument of subset [deprecated]
 
         Returns