cperl-font-lock-fontify-region-function
cperl-font-lock-fontify-region-function is a compiled Lisp function in `cperl-mode.el
'.
(cperl-font-lock-fontify-region-function BEG END LOUDLY)
Extends the region to safe positions, then calls the default function.
Newer `font-lock's can do it themselves.
We unwind only as far as needed for fontification. Syntaxification may
do extra unwind via `cperl-unwind-to-safe'.