org-agenda.el (org-diary): Fix tiny typo

* org-agenda.el (org-diary): Fix tiny typo.

lisp/org-agenda.el

@@ -4732,7 +4732,7 @@ Needed to avoid empty dates which mess up holiday display."
 
 ;;;###autoload
 (defun org-diary (&rest args)
-  "Return diary information from org-files.
+  "Return diary information from org files.
 This function can be used in a \"sexp\" diary entry in the Emacs calendar.
 It accesses org files and extracts information from those files to be
 listed in the diary.  The function accepts arguments specifying what