If output of hy expression is either too long or contains newline use refheap (previously only too long case was handled)
If output of hy expression is either too long or contains newline use
refheap (previously only too long case was handled)

Signed-off-by: Vasudev Kamath <ec7044d49bb264561b50c8dd64a8458a0fc7683b@gmail.com>

hylang/hygdrop,hylang/hygdrop