continuation character for meta commands in psql

I've searched the internet and also the pgsql-general list for an answer to this question, but couldn't find one.

Is there a continuation character for meta commands in psql?

I've seen mention that a caret (^) could be used, but it didn't work correctly and the psql man page makes no mention of it.

I'd like to do something like:

\set PROMPT1 'long prompt code' \

'other long prompt configurations' \

'and more still'

in my .psqlrc file.

What do you folks think?

Thanks for any help or guidance!

-m