testcover-prog1-functions is a variable defined in `testcover.el'.
Its value is
(prog1 unwind-protect)
This variable may be risky if used as a file-local variable.
Documentation:
Functions whose return value is the same as their first argument. No
brown splotch is shown for these if the first argument is a constant or a
call to one of the `testcover-1value-functions'.
You can customize this variable.