Documentation fixes for ox-koma-script.el

* ox-koma-letter.el commentary (org-koma-letter-use-backaddress):
  Better documentation.

Signed-off-by: Alan Schmitt <alan.schmitt@polytechnique.org>
Documentation fixes for ox-koma-script.el

* ox-koma-letter.el commentary (org-koma-letter-use-backaddress):
  Better documentation.

Signed-off-by: Alan Schmitt <alan.schmitt@polytechnique.org>
Allow separate subject and title in ox-koma-letter

* ox-koma-letter.el (org-koma-letter-use-title): New variable.
(org-koma-letter-prefer-subject): New variable.
(org-koma-letter-template): Allow separate subject and title.

Signed-off-by: Alan Schmitt <alan.schmitt@polytechnique.org>
org.el (org-file-contents): Return an empty string instead of the message

* org.el (org-file-contents): Return an empty string instead
of the message.
Merge branch 'maint'

Conflicts:
	contrib/lisp/ox-koma-letter.el
Fix left-over merge conflict
ox-koma-letter: Use `org-koma-letter-use-title'

* contrib/lisp/ox-koma-letter.el (org-koma-letter-template): Use
  `org-koma-letter-use-title'.  Small refactoring.
ox-koma-letter: Reorder "SUBJECT" in template
Revert "org.el (org-agenda-prepare-buffers): Restore the point position"

This reverts commit fe3379bda6ca23474639b114592958bf14431c88.
Partially reapply fe3379bda6ca23474639b114592958bf14431c88

* org.el (org-agenda-prepare-buffers): Use `save-excursion'
instead of `save-window-excursion'.

Thanks to Florian Beck for reporting this.
Merge branch 'maint'
org-table.el: Fix bugs about cursor repositioning

* org-table.el (org-table-copy-down)
(org-table-find-dataline, org-table-move-row)
(org-table-insert-hline, org-table-kill-row): Use
`org-move-to-column' with the IGNORE-INVISIBLE arg set to `t',
so that abbreviated rows don't interfer with setting the
cursor back at the correct position.

Thanks to Jason Lewis for reporting one of these bugs.
Merge branch 'maint'
org.texi (Initial visibility): Fix typo

* org.texi (Initial visibility): Fix typo.
org.texi (In-buffer settings, Radio tables): Tiny fixes

* org.texi (In-buffer settings, Radio tables): Tiny fixes.
Merge branch 'maint'

Conflicts:
	doc/org.texi
Fix 44acd0004

Thanks to Paul Stansell for reporting this.
Merge branch 'maint'
New function to toggle fixe-width areas

* lisp/org.el (org-toggle-fixed-width): New function.
* testing/lisp/test-org.el (test-org/toggle-fixed-with): New test.

This replaces the old implementation removed in commit
6a00c96541a2a01c08fbeeaf96e552683d9c3163.
initial support for Coq code blocks