The syntax change was announced in Dec last year: https://lists.gnu.org/archive/html/emacs-orgmode/2015-12/msg00525.html
At the current git master, the org source:
#+BEGIN_TEXINFO
@quotation
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with the Front-Cover Texts being ``A GNU Manual,''
and with the Back-Cover Texts as in (a) below. A copy of the license
is included in the section entitled ``GNU Free Documentation License.''
(a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
modify this GNU manual.''
@end quotation
#+END_TEXINFO
results in the following .texi output:
@TEXINFO
@@quotation
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with the Front-Cover Texts being ``A GNU Manual,''
and with the Back-Cover Texts as in (a) below. A copy of the license
is included in the section entitled ``GNU Free Documentation License.''
(a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
modify this GNU manual.''
@@end quotation
@end TEXINFO
This was done with `emacs -Q', no extra code except (require 'ox-texinfo).
Note that the above org source works fine with the built-in Org-mode:
@quotation
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with the Front-Cover Texts being ``A GNU Manual,''
and with the Back-Cover Texts as in (a) below. A copy of the license
is included in the section entitled ``GNU Free Documentation License.''
(a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
modify this GNU manual.''
@end quotation
@c Emacs 25.0.50.4 (Org mode 8.2.10)
regards,
Oleh