positioning of \revert

[Paul Scott]

In 2.11.37 NR 6.1.5 mention is made of \revert not working.  This should 
probably be expanded to explain what it takes for an \override to be 
established so that the corresponding \revert will work.  If I knew the 
answer I would attempt to do this but I don't.

In the following example the \revert cancels the \override before the 
\override happens:

\override Score.RehearsalMark #'font-size = #1
\mark "text"
\revert Score.RehearsalMark #'font-size

Paul Scott