[AUCTeX] \verb like macro allowing input on more than one line

[jfbu]

I have a verbatim like macro with delimiters, I call it
\everb, which contrarily to \verb accepts multi-line input.

I customized variable LaTeX-verbatim-macros-with-delims
but the font-locking applies only to cases where
argument is on one line:

\everb|foo bar| % ok

\everb|foo
bar|            % no font locking

Is there a way do enably font-locking in the latter case?

Best regards

Jean-Francois