[PATCH] org.el: inline display of attached images in link descriptions

[Steven Allen <steven@stebalien.com>]

* lisp/org.el (org-display-inline-images): inline display of attached
images in link descriptions.

Previously, `org-display-inline-images' only inlined images in link
descriptions when they were explicit "file:" links. This change adds
support for "attachment:" links. E.g.:

    [[https://orgmode.org][attachment:emacs-screenshot.png]]
---
 lisp/org.el | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lisp/org.el b/lisp/org.el
index 0e5740412..3e1b757c4 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -16301,7 +16301,8 @@ defun org-create-formula-image
 
   2. Its description consists in a single link of the previous
      type.  In this case, that link must be a well-formed plain
-     or angle link, i.e., it must have an explicit \"file\" type.
+     or angle link, i.e., it must have an explicit \"file\" or
+     \"attachment\" type.
 
 Equip each image with the key-map `image-map'.
 
@@ -16332,7 +16333,7 @@ defun org-create-formula-image
 	       ;; "file:" links.  Also check link abbreviations since
 	       ;; some might expand to "file" links.
 	       (file-types-re
-		(format "\\[\\[\\(?:file%s:\\|attachment:\\|[./~]\\)\\|\\]\\[\\(<?file:\\)"
+		(format "\\[\\[\\(?:file%s:\\|attachment:\\|[./~]\\)\\|\\]\\[\\(<?\\(?:file\\|attachment\\):\\)"
 			(if (not link-abbrevs) ""
 			  (concat "\\|" (regexp-opt link-abbrevs))))))
 	  (while (re-search-forward file-types-re end t)
-- 
2.40.1