Re: [Lilypond-auto] Issue 2717 in lilypond: Patch: Implement \hidden/\hide as shorthands for \tweak/\override #'stencil = ##f

[lilypond]

Comment #21 on issue 2717 by address@hidden: Patch: Implement \hidden/\hide as  
shorthands for \tweak/\override #'stencil = ##f
http://code.google.com/p/lilypond/issues/detail?id=2717

Regarding comment #20:

\single = "do the following commands and only apply them to the single item  
following them, as a \tweak"

\single\once ... is the same as \single ..., and \once\single is nonsense  
since \single first converts overrides to a tweak, and you can't apply  
\once on a tweak.

"once" and "single" are not synonymous.  "once" is the same as "a single  
time", but the point is that "\single" applies an override just to a single  
item.

Or in other words: \single converts overrides into one or more \tweaks.   
This means that you can write something like <\single\hideNotes c e g> and,  
in contrast to
\once\hideNotes <c e g>, just the c will get hidden (I can't vouch for what  
will happen to the Stem: this will depend on whether LilyPond considers the  
NoteHead for c as the cause of the Stem, or rather that of some other note).

I would not care explaining this distinction to Fridolin: he tends to  
ignore distinctions such as the distinction between inside and outside of a  
fence.