org-list: Operate on single line if no active region

* lisp/org-list.el (org-toggle-item): Operate on single line if no
active region.

lisp/org-list.el

@@ -2953,7 +2953,7 @@ With a prefix argument ARG, change the region in a single item."
     (if (org-region-active-p)
 	(setq beg (funcall skip-blanks (region-beginning))
 	      end (copy-marker (region-end)))
-      (setq beg (funcall skip-blanks (point-at-bol))
+      (setq beg (point-at-bol)
 	    end (copy-marker (point-at-eol))))
     ;; Depending on the starting line, choose an action on the text
     ;; between BEG and END.

testing/lisp/test-org-list.el

@@ -1004,6 +1004,13 @@ b. Item 2<point>"
 	  (org-test-with-temp-text "* H\n:PROPERTIES:\n:A: 1\n:END:\n\n\nText"
 	    (org-toggle-item nil)
 	    (buffer-string))))
+  ;; When no region is marked and point is on a blank line
+  ;; only operate on current line.
+  (should
+   (equal " \n* H :tag:"
+	  (org-test-with-temp-text "<point> \n* H :tag:"
+	    (org-toggle-item nil)
+	    (buffer-string))))
   ;; When a region is marked and first line is a headline, all
   ;; headlines are turned into items.
   (should