[Lilypond-auto] Issue 2938 in lilypond: Document property stack structure and use of \temporary in Extending

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Documentation

New issue 2938 by address@hidden: Document property stack structure  
and use of \temporary in Extending
http://code.google.com/p/lilypond/issues/detail?id=2938

See 5c4b80afe97acbe20199a3aa71a0d63172112f23

Normal overrides change the top of the current property
stack rather than pushing to it, by having the pop-first
property set in the music.  It was agreed this is the
best action in most circumstances.  Occasionally the
correct stacking operation is required, and \temporary
achieves this by removing this property from its argument's
overrides.  This should be documented in the Extending
Manual, but not in the Notation Reference.