Re: Issue 2249 in lilypond: ledger lines of pitched rests are verticaly misplaced

[lilypond]

Comment #7 on issue 2249 by address@hidden: ledger lines of pitched  
rests are verticaly misplaced
http://code.google.com/p/lilypond/issues/detail?id=2249

> i don't know what the situation was before Pal's fix

off my head: the rest was moved (together with the single ledger line) up;  
extra ledger lines (between staff and rest grob) were not drawn.
in case of nonstandard staves this made for _all_ rests appearing in wrong  
position.
the point in my fix was that *if* the user explicitly asks for a position,  
then LilyPond shouldn't overrule.

I see the issue at hand totally unrelated to issue 2109; in fact there are  
two separate issues:
1. not enough ledger lines
2. ledger line not aligned to staff

however, this may actually be the required behaviour for a staff with two  
voices, the lower going above the staff while the upper takes a rest.

> i think we should revert this patch.

not too quickly, please.  I'd like to see that without my patch the  
original problem goes away.
my patch seems small, but it fixed an actual problem of mine that I  
couldn't work around in my .ly sources.
(I may add that when my files broke I found the patch that caused the  
regression, but saw that it was good, just exposed a bug.)