too long for one line Local Variables in Files

[Dan Jacobson]

The info node "Local Variables in Files" should mention how to use
more than one line to set the same variable.
E.g., how to say
 <!-- Local Variables: -->
 <!-- compile-command: "f=central.html; grep ^[0-9] $f|sort -nc && perl  -F, 
-alnwe 'next unless/^\\d/; print if ($F[0]/.0125)=~/\\D/' $f" -->
 <!-- End: -->
but not use lines more than 80 characters long.

I tired lots of methods, all getting "Local variables entry is missing
the suffix".
emacs-version "22.0.50.1"