Declare variables on the same line

[certik]

This is the most natural Python syntax to declare variables on the same
line.

[czgdp1807]

This is cool.

[czgdp1807]

I think we can merge this?

[certik]

Sure. I think this is good enough. It's slightly annoying to do x: i32; y: i32; z: i32 instead of x, y, z: i32, but the Python syntax does not allow it. And doing something like i32("x y z") seems not worth it. I think the above is good enough for now.

[czgdp1807]

Yeah at least every declaration stays in the same line.