Variable: mercury-mode-hook
mercury-mode-hook is a variable defined in prolog.el.gz.
Value
nil
Documentation
Hook run after entering mercury-mode.
No problems result if this variable is not bound.
add-hook automatically binds it. (This is true for all hook variables.)
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/prolog.el.gz