[perl #117853] [BUG] can't assign here documents to constants

[Carl Mäsak via RT]

<jnthn> masak: I think https://rt.perl.org/Ticket/Display.html?id=117853 can 
get a test (if there isnt' already one) and be closed now?
<masak> jnthn: yep. was gonna add that to the ticket.
* masak adds it now