Only paste multiline python code to refheap, single line code can be
directly pasted to IRC.

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