2023-06-26  Stephen Berman  <stephen.berman@gmx.net>

	Prevent truncation of todo-mode categories sexp

	* todo-mode.el (todo-delete-file, todo-move-category)
	(todo-convert-legacy-files, todo-update-categories-sexp)
	(todo-check-format): Bind print-length and print-level to nil
	before using prin1 and related functions, to avoid truncating the
	todo categories sexp and possibly corrupting the file format.