Save the code above to a file called @file{lilybook.lytex}, then in a
terminal run
+@c keep space after @version{} so TeX doesn't choke
@example
lilypond-book --output=out --pdf lilybook.lytex
-@emph{lilypond-book (GNU LilyPond) 2.11.37}
+@emph{lilypond-book (GNU LilyPond) @version{} }
@emph{Reading lilybook.lytex...}
@emph{..lots of stuff deleted..}
@emph{Compiling lilybook.tex...}