hilit-chg-set-face-on-change
hilit-chg-set-face-on-change is a compiled Lisp function in `hilit-chg.el
'.
(hilit-chg-set-face-on-change BEG END LENG-BEFORE &optional NO-PROPERTY-CHANGE)
Record changes and optionally display them in a distinctive face.
`hilit-chg-set' adds this function to the `after-change-functions' hook.