* contrib/lisp/ox-extra.el (org-extra--merge-sections): New function.
(org-export-ignore-headlines): Merge multiple sections that result
from removing ignored headlines.
Prevent org-export-ignore-headlines from violating the one headline to
one section mapping that is relied on by at least one export backend,
ox-texinfo. (ox-texinfo uses each section to generate the menu.)
* lisp/org-element.el (org-element-export-block-parser):
(org-element--current-element): Use new syntax for export blocks.
(org-element-block-name-alist): Remove.
* lisp/ox.el (org-export-register-backend):
(org-export-define-derived-backend): Remove :export-block keyword from
back-end's definition.
(org-export-expand-include-keyword): Use new syntax for include
keywords.
* lisp/ox-ascii.el (ascii):
* lisp/ox-beamer.el (beamer):
* lisp/ox-html.el (html):
* lisp/ox-latex.el (latex):
(org-latex-prefer-user-labels):
* lisp/ox-man.el (man):
* lisp/ox-md.el (md):
* lisp/ox-odt.el (odt):
* lisp/ox-texinfo.el (texinfo): Propagate changes to "ox.el".
* lisp/ob-core.el (org-babel-insert-result):
* lisp/ob-haskell.el (org-babel-haskell-export-to-lhs): Use new syntax.
* lisp/org.el (org-structure-template-alist): Use new syntax.
(org-protecting-blocks): Add "export" to protected blocks. Remove
back-ends blocks, which are now special blocks.
(org-fontify-meta-lines-and-blocks-1): Fontify correctly new blocks.
* lisp/org-footnote.el (org-footnote-forbidden-blocks):
* lisp/org-list.el (org-list-forbidden-blocks): Add "export" to
forbidden blocks. Remove back-ends blocks, which are now special
blocks.
* contrib/lisp/ox-extra.el: Update comments.
* testing/lisp/test-org-element.el (test-org-element/export-block-parser):
(test-org-element/export-block-interpreter):
* testing/lisp/test-ob.el (test-ob/org-babel-remove-result--results-html):
(test-ob/org-babel-remove-result--results-latex):
* testing/lisp/test-ox.el (test-org-export/expand-include): Update tests.
Export blocks are explicitly marked as such at the syntax level to
disambiguate their parsing from special blocks. The new syntax is
#+BEGIN_EXPORT backend
...
#+END_EXPORT
instead of
#+BEGIN_backend
...
#+END_backend
As a consequence, =INCLUDE= keywords syntax is modified, e.g.,
#+INCLUDE: "file.org" HTML
becomes
#+INCLUDE: "file.org" export html