[LSR 2.20] what to do with #280

[Thomas Morley]

Currently
"Engravers one-by-one"
http://lsr.di.unimi.it/LSR/Item?id=280
returns several times:
programming error: script direction not yet known

This happens since 2.16.

Though, this is a doc-snippet.
What to do?

Cheers,
  Harm