Re: [Lilypond-auto] Issue 2874 in lilypond: Patch: Provide an \undo function for turning overrides and sets into reverts and unsets

[lilypond]

Updates:
        Labels: -Patch-countdown Patch-new

Comment #5 on issue 2874 by address@hidden: Patch: Provide an \undo function  
for turning overrides and sets into reverts and unsets
http://code.google.com/p/lilypond/issues/detail?id=2874#c5

\undo\hideNotes is equivalent to \unHideNotes, \undo\easyHeadsOn to
\easyHeadsOff.  While this can't undo reverts, it is useful for a lot
of overriding commands defined in ly/property-init.ly, and is also
useful in combination with \hide/\omit.

http://codereview.appspot.com/6588067