conf-xdefaults-mode is an interactive autoloaded compiled Lisp function in `
Parent mode: `conf-colon-mode'.
Conf Mode starter for Xdefaults files.
Comments start with `!' and "assignments" are with `:'.
For details see `conf-mode'. Example:
! Conf mode font-locks this right with M-x conf-xdefaults-mode (.Xdefaults)
In addition to any hooks its parent mode `conf-colon-mode' might have run,
this mode runs the hook `conf-xdefaults-mode-hook', as the final step