Re: perl mode color highlighting working badly

[Richard M. Stallman]

    The problem is that in perl-mode some syntax-table text-properties are set
    in font-lock-syntactic-keywords, while others are set in
    font-lock-syntactic-face-function, and that font-lock+jit-lock applies
    font-lock-syntactic-keywords to "all" the buffer but only applies
    font-lock-syntactic-face-function to the displayed part of the buffer.

Would it be better to apply font-lock-syntactic-face-function
to "all" the buffer, too?

(What is the significance of those quotes around "all"?)