Multiline IEx support? (Inspiration from 2.7 IRB)

[Edison Yap]

With the recent Ruby 2.7 release came a new version of the IRB and that works really well.

Some of the features I'd like to see in IEx is:
- Multiline REPL support (so when you key-up on your history, it returns a whole block instead of a single line)
- Navigate block (when you are in Block mode, key-up should navigate around within the bloc, instead of cycling through history).

It's rather hard to put it into words, but I urge you to try the 2.7 IRB and give it a feel.

Here's a screenshot that hopefully illustrates what I'm trying to convey.



Would something like this require changes to the erlang shell?

[Po Chen]

Or ipython

[Po Chen]

[Po Chen]

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