org-table.el (org-table-fix-formulas): Fix commit eb28fe

Thanks to Michael Brand for reporting this.
Merge branch 'maint'
org-element: Fix `org-element-at-point' at eob

* lisp/org-element.el (org-element-at-point): Return appropriate value
  when point is at end of buffer and a cached element was found above.
Fix multiple TBLFM

Simplify commit release_8.2.4-14-geb28fe4 and commit
release_8.2.5c-8-ga2619b7.

* org-table.el (org-table-fix-formulas): Handle multiple #+TBLFM lines
with `forward-line'.
Merge branch 'maint'
ob-core: Speed improvement

* lisp/ob-core.el (org-babel-get-inline-src-block-matches): Do not
  compute line number if all is needed is to know if we're on the
  first one.
Merge branch 'maint'
org.texi: Fix some sections subtitiles

* doc/org.texi (Top, Exporting): Org has its own documentation and
  should therefore be removed from "Other build-in back-ends".
Merge branch 'maint'
Default `org-html-allow-name-attribute-in-anchors' to nil for HTML5
compatibily.
Add customization options for html checkboxes.

(org-html-checkbox-types): New constant. Contains unicode, ascii and html
checkbox alists.
(org_html_checkbox_type): New customzation variable can be set to one
of the above choices.  Defaults to "ascii"
(org-html-checkbox): Use the appropriate set of checkboxes as
specified in `org-html-checkbox-type'.
ox-html: Fix checkbox customization

* lisp/ox-html.el (org-html-checkbox-types): Fix docstring.
(org-html-checkbox-type): Use symbols instead of strings.  It avoids
to rely on `intern' later on.  Modify docstring so its first line
contains only a complete sentence.
(org-html-checkbox): Use `assq' instead of `assoc'.

This fixes 2c782da8019de4eded3b5686fcfffa51abda1585.
ox-html: Fix a docstring

* lisp/ox-html.el (org-html-checkbox-types): Emphasize valid symbols
  to use for configuration.
ox-html: Fix a docstring

* lisp/ox-html.el (org-html-allow-name-attribute-in-anchors): Default
  value changed in 36a21d9372727f4ce0627282a75246ddf172fbf8.  The
  docstring now reflects this change.
Backport changes from r115955
Merge branch 'maint'
org.texi: Fix sectioning

* doc/org.texi (Global and local cycling): Remove "Initial visibility"
  and "Catching invisible edits" subsections since they already are
  located in "Visibility cycling" menu.
Speed improvement

* lisp/org.el (org-get-previous-line-level): Do not call
  `org-current-level' twice unless necessary.  Also, avoid using
  `line-number-at-pos' when the information needed is to know if point
  is in the first line of the visible part of the buffer.
Merge branch 'maint'
Merge branch 'maint' of orgmode.org:org-mode into maint