[Feature Request] Implicit Printing and Last Outputs in JupyterEnv

[alperenunlu]

Request

Need Implicit Printing and accessing the last outputs using "_" and "__" in Playground

Motivation

For testing the language features using implicit printing and accessing last outputs in notebook environment helps a lot.

Description and Requirements

let x: Int = 2
x

outputs: 2

x * x

outputs: 4

_, __

outputs: (4, 2)

[czheo]

Maybe also _1, _2 and etc. Here are some examples: https://stackoverflow.com/questions/200020/get-last-result-in-interactive-python-shell

[sa-]

Support for jupyter's tab completion and shift+tab for documentation would also be very appreciated!