Update Lib/csv.py

Replacing "checking" by "check" in the comments

Co-authored-by: C.A.M. Gerlach <[email protected]>

Author: Drakariboo

Lib/csv.py

@@ -420,7 +420,7 @@ def has_header(self, sample):
                 continue # skip rows that have irregular number of columns
 
             for col in list(columnTypes.keys()):
-                # checking if all col are strings
+                # check if all col are strings
                 if row[col].isnumeric():
                     col_are_strings = False