Fix #11509. Significantly increase test coverage for fileinput. Patch by Denver Coneybeare at the PyCon 2011 Sprints.
Fix #11509. Significantly increase test coverage for fileinput.
Patch by Denver Coneybeare at the PyCon 2011 Sprints.

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