Hi!

a8d007db15 starts generating doc/org-version.{tex,inc}, but on my OS X
system this ends up creating broken files with (I believe) vertical tab
characters in them.  On HEAD this morning:

$ make card
[...]
PDFLATEX=pdftex texi2pdf --batch --clean --expand orgcard.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live 2017) (preloaded
format=pdftex)
 restricted \write18 enabled.
entering extended mode

(../../.././orgcard.tex
(/Users/dale/repositories/org-mode/doc/org-version.tex
/Users/dale/repositories/org-mode/doc/org-version.tex:3: Missing control
sequen
ce inserted.
<inserted text>
                \inaccessible
<to be read again>


l.3 \def
         ersionyear{2017}
[...]
/opt/local/bin/texi2dvi: pdftex exited with bad status, quitting.
make[1]: *** [orgcard.pdf] Error 1
make: *** [card] Error 2

$ cat doc/org-version.tex
% automatically generated, do not edit
\def\orgversionnumber{9.0.9}
\def
    ersionyear{2017}
\def\year{2017}

I have no idea how that \v is getting turned into a vertical tab.  Is make
processing these?

$ gmake --version
GNU Make 4.2.1
Built for x86_64-apple-darwin15.6.0
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html
>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
$ cat /tmp/test-makefile
single:
echo "single: 123\v456"

double:
echo "double: 123\\v456"

quad:
echo "quad: 123\\\\v456"
$ gmake -f /tmp/test-makefile single double quad
echo "single: 123\v456"
single: 123
           456
echo "double: 123\\v456"
double: 123
           456
echo "quad: 123\\\\v456"
quad: 123\v456

Is this something screwed up in my environment or are others seeing this as
well?

Thanks,
Dale