like this:
-@c newlines in intertext choke on lilypond.org?
-@lilypond[fragment,verbatim, relative 1, intertext="produces this:"]
+@lilypond[fragment,verbatim, relative 1, intertext="produces this:
+
+"]
\key c \minor r8 c16 b c8 g as c16 b c8 d | g,4
@end lilypond