show ielm in a popwin buffer, default in insert-mode.

[punassuming]

Get ielm to work with popwin. Default to insert-mode if evil is active.

[bmag]

I voted against because (1) I tend to use IELM as a normal interactive shell, the same as I would use a Python terminal, so using popwin and hiding the buffer on C-g would be uncomfortable, and (2) because it's inconsistent with all other terminals and REPLs (at least those that I've used), except for the shell layer's shells.

[d12frosted]

@syl20bnr is it still in merging state? 😸 I don't see it on develop.

[syl20bnr]

Thank you!

I was merging it and I asked myself the same questions as @bmag, I came here to comment and saw @bmag's comment so I'm for not merging this one for the sake of consistency with the other REPLs.