(Fminibuffer_prompt_end, Fminibuffer_contents)

(Fminibuffer_prompt_end, Fminibuffer_contents)
(Fminibuffer_contents_no_properties, Fdelete_minibuffer_contents):
New functions (were in simple.el).
(Fminibuffer_complete_and_exit, Fminibuffer_complete_word)
(read_minibuf, do_completion, Fminibuffer_completion_help): Use them.
(syms_of_minibuf): Initialize them.