Update Lib/csv.py

Change line 397 : "w" in uppercase.

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

Author: Drakariboo

Lib/csv.py

@@ -394,7 +394,7 @@ def has_header(self, sample):
         # can't be determined, it is assumed to be a string in which case
         # the length of the string is the determining factor: if all of the
         # rows except for the first are the same length, it's a header.
-        # when the strings have varying length, the average length of all
+        # When the strings have varying length, the average length of all
         # strings becomes a determining factor.
         # Finally, a 'vote' is taken at the end for each column, adding or
         # subtracting from the likelihood of the first row being a header.