Further on regtests - 2.15.33

[Phil Holmes]

I've just run my pixel comparator and discovered that the regtest 
whiteout.ly has a habit of changing between releases - sometimes the not 
stem is there, sometimes it's whited out.  The description says:

The whiteout command underlays a white box under a
markup.  The whitening effect only is only guaranteed for staff lines,
since staff lines are in a lower layer than most other grobs.

Seems to me it's not a good regtest if it's not consistent?

--
Phil Holmes