Correct and improve comments in test_fileinput (closes #20501). Thanks Vajrasky Kok and Zachary Ware.
Correct and improve comments in test_fileinput (closes #20501).
Thanks Vajrasky Kok and Zachary Ware.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator