grade-school: update tests to v1.0.1 (#2145)

* grade-school: update tests to v1.0.1

* Remove trailing comma

Comma was added by black v19.10b0. Currently, the CI uses v19.3b0, which
does not add the trailing comma.

Author: cmccandless

exercises/grade-school/grade_school_test.py

@@ -2,7 +2,7 @@
 
 from grade_school import School
 
-# Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.0
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.1
 
 
 class GradeSchoolTest(unittest.TestCase):