* ielm.el (ielm-noisy, ielm-dynamic-return, ielm-mode-hook)

* ielm.el (ielm-noisy, ielm-dynamic-return, ielm-mode-hook)
  (ielm-dynamic-multiline-inputs): Remove * from defcustom docstrings.
  (ielm-prompt-read-only, ielm-font-lock-keywords): Fix docstring typos.
  (ielm-map): Define within defvar.  Add docstring.
  (ielm-tab, ielm-eval-input, ielm-get-old-input, ielm-return)
  (ielm-complete-filename): Use `when', `unless'.
  (ielm-is-whitespace-or-comment): Use `string-match-p'.
  (ielm-return, ielm-get-old-input): Use `looking-at-p'.
  (ielm-change-working-buffer): Check that the buffer is live.
  (inferior-emacs-lisp-mode): Define with `define-derived-mode'.
  Simplify.  Reflow docstring.
  (inferior-emacs-lisp-mode-hook, inferior-emacs-lisp-mode-map):
  New aliases, to satisfy `define-derived-mode' expectations.