* lisp/org.el (org-link-expand-abbrev): Fix docstring

lisp/org.el

@@ -8575,7 +8575,7 @@ call CMD."
 ;;; Link abbreviations
 
 (defun org-link-expand-abbrev (link)
-  "Apply replacements as defined in `org-link-abbrev-alist."
+  "Apply replacements as defined in `org-link-abbrev-alist'."
   (if (string-match "^\\([^:]*\\)\\(::?\\(.*\\)\\)?$" link)
       (let* ((key (match-string 1 link))
 	     (as (or (assoc key org-link-abbrev-alist-local)