Changing spacing-increment under 2.3.25?

[Benjamin Esham]

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I'm using LilyPond 2.3.25 under Mac OS X, and I'm trying to change the 
value
of spacing-increment.  With previous versions, I could do, e.g.,

\paper {
    \context { \Score \override SpacingSpanner #'spacing-increment = 
#3.0 }
}

but in the latest version, this doesn't work anymore.  How can I do 
this under
2.3.25?  Thanks (and happy Halloween, if you celebrate it)!

- -- 
Benjamin D. Esham      {      http://bdesham.net
address@hidden      }      AIM: bdesham 1 2 8
Wikipedia, the Free Encyclopedia - wikipedia.org
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