Improve last todo-mode fix

* lisp/calendar/todo-mode.el (todo-read-category): Use
set-keymap-parent instead of copy-keymap, and default (as
previously) to the global binding (for rationale, see
http://lists.gnu.org/archive/html/emacs-devel/2016-06/msg00217.html).

diff --git a/lisp/calendar/todo-mode.el b/lisp/calendar/todo-mode.el
index f0d4bc5961b9ae7bd3fd8d3ade0bc4f70f94314b..7cfec137b043e26b72188177da863bca5d31fd73 100644 (file)
--- a/lisp/calendar/todo-mode.el
+++ b/lisp/calendar/todo-mode.el
@@ -5751,8 +5751,9 @@ against categories in that file; otherwise complete against all
 categories from `todo-category-completions-files'."
   ;; Allow SPC to insert spaces, for adding new category names.
   (let ((minibuffer-local-completion-map
-         (copy-keymap minibuffer-local-completion-map)))
-    (define-key minibuffer-local-completion-map " " 'self-insert-command)
+         (let ((map (make-sparse-keymap)))
+           (set-keymap-parent map minibuffer-local-completion-map)
+           (define-key map " " nil))))
     (let* ((add (eq match-type 'add))
           (archive (eq match-type 'archive))
           (file0 (when (and file (> (length todo-files) 1))