git master no longer builds

[Joe Neeman]

There seems to be a documentation problem in git master; typing "make" (even 
on a cleanly checked out copy) gives me many repetitions of the following:

LANG= makeinfo --enable-encoding -I ./out --output=./out/lilypond.info 
out/lilypond.nexi
out/lilypond.nexi:11: warning: unrecognized encoding name `UTF-8'.
/home/joe/programming/lilypond/Documentation/user/out//pitches.texi:392: 
Unknown command `quoteleft'.
/home/joe/programming/lilypond/Documentation/user/out//pitches.texi:392: 
Misplaced {.
/home/joe/programming/lilypond/Documentation/user/out//pitches.texi:392: 
Misplaced }.
/home/joe/programming/lilypond/Documentation/user/out//pitches.texi:392: 
Unknown command `quoteright'.