Minor-mode doc fixes for ARG behavior

Minor-mode doc fixes for ARG behavior

* lisp/completion.el (dynamic-completion-mode):
* lisp/dirtrack.el (dirtrack-debug-mode):
* lisp/electric.el (electric-layout-mode):
* lisp/epa-mail.el (epa-mail-mode, epa-global-mail-mode):
* lisp/face-remap.el (text-scale-mode, buffer-face-mode):
* lisp/iimage.el (iimage-mode):
* lisp/image-mode.el (image-transform-mode):
* lisp/minibuffer.el (completion-in-region-mode):
* lisp/scroll-lock.el (scroll-lock-mode):
* lisp/simple.el (next-error-follow-minor-mode):
* lisp/tar-mode.el (tar-subfile-mode):
* lisp/tooltip.el (tooltip-mode):
* lisp/vcursor.el (vcursor-use-vcursor-map):
* lisp/wid-browse.el (widget-minor-mode):
* lisp/emulation/tpu-edt.el (tpu-edt-mode):
* lisp/emulation/tpu-extras.el (tpu-cursor-free-mode):
* lisp/international/iso-ascii.el (iso-ascii-mode):
* lisp/language/thai-util.el (thai-word-mode):
* lisp/mail/supercite.el (sc-minor-mode):
* lisp/net/goto-addr.el (goto-address-mode):
* lisp/net/rcirc.el (rcirc-multiline-minor-mode, rcirc-track-minor-mode):
* lisp/progmodes/cwarn.el (cwarn-mode):
* lisp/progmodes/flymake.el (flymake-mode):
* lisp/progmodes/glasses.el (glasses-mode):
* lisp/progmodes/hideshow.el (hs-minor-mode):
* lisp/progmodes/pascal.el (pascal-outline-mode):
* lisp/textmodes/enriched.el (enriched-mode):
* lisp/vc/smerge-mode.el (smerge-mode):
Doc fixes (minor mode argument).

* etc/NEWS: Related markup.