of a new entry inside of an existing entry. Minor code cleanup.
(todo-add-category): Change the interactive spec. Signal an error
if the Todo file is non-empty but contains no category. Reject
category names that could induce bugs and confusion. Call
todo-mode if the Todo file is new and unsaved. Simplify handling
of local variables cookie. Properly display the newly added
category in Todo mode.
(todo-show): Call todo-initial-setup only if there is neither a
Todo file nor a corresponding unsaved buffer.
(todo-category-alist): Delete function.
(todo-completing-read): New function.
(todo-insert-item, todo-jump-to-category): Use it.
(todo-insert-item): Make the use of the prefix argument conform to
the doc string.
685b547932