their names, which is inconsistent with the grader's use of
`points' as a type for grades which have a number of possible
points. Change to `fourpoints'?
+** TODO [#B] More helpful messages in report for ungraded assignments :ui:reporting:
+ Since 0.1.7, assignments with no grades in them get an unhelpful:
+ "No statistics available for this assignment, because:
+ min() arg is an empty sequence"
+ This is arguably better than the previous situation (a complete but
+ empty report containing every student's name as someone who is
+ missing a grade). But it would be better to indicate that no
+ information is provided because no grades have been entered for
** f890cef9d: grading/db.py: fix bug in select_students giving duplicate rows
- problem was join: a student can appear in multiple courses, so