The part of a @code-assignment below the 'end' is editable even when writing test cases

[justinpombrio]

A code assignment has three editable parts:

fun blah():
_HERE (A)_
where:
_HERE (B)_
end
_HERE (C)_

I would expect B to be editable when the tests are selected and A and C to be editable when the function is selected, but instead C is always editable. This tripped up a student who wrote her test cases below 'end'.