lilypond documentation build issue (both 2.18.2 and 2.19.16)

[Petr Gajdos]

Hello,

please help me with debugging following build failure:

https://build.opensuse.org/build/multimedia:apps/openSUSE_Factory/x86_64/lilypond-doc/_log

fretted-strings.texi2pdf.log reads:

-----------------------
> 
This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/TeX Live
for SUSE Linux)
 restricted \write18 enabled.
entering extended mode
(./fretted-strings.texi
./fretted-strings.texi:10: Undefined control sequence.
l.10 @c \version
                 "2.19.2"
? 
./fretted-strings.texi:10: Emergency stop.
l.10 @c \version
                 "2.19.2"
./fretted-strings.texi:10:  ==> Fatal error occurred, no output PDF
file produc
ed!
Transcript written on fretted-strings.log.
/usr/bin/texi2dvi: pdfetex exited with bad status, quitting.
-----------------------

Interesting for me as texinfo noob is, that the failure happens while
processing a comment.

Please find exact versions of packages used for build in the log,
including texinfo-5.2.

Thanks!
Petr

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