Re: address@hidden: C++-mode: Syntax highlighting: wrong color for function identifier depending on the kind of whitespace that follows]

[Richard Stallman]

    All the consecutive chars with a non-nil font-lock-multiline property will
    always be re-fontified together.  E.g. if it is put on three consecutive
    lines, a modification on any of the three lines will cause all three to be
    re-fontified.

Is there a way they can use font-lock to install these properties
when necessary, automatically?

Could you write documentation for this feature to put into lispref/modes.texi?