Spec out whitespacing / line break behaviors

[Huxpro]

As a follow up of #136, we should documenting the whitespacing divergence between implementations.

[nicolo-ribaudo]

Babel will have a major release in 2022, so if our current implementation is more confusing than others we could potentially make a breaking change.

[wooorm]

@nicolo-ribaudo that could be tomorrow 😅 Any rough idea for earliest, or a link to a tracking issue, would likely help here?

[nicolo-ribaudo]

"A few months" at least (I hope to publish the first pre release in April/May), and maybe the first stable release in late summer (northern hemisphere). The original plan was to release it in 2020 so it's possible that it will be delayed even more 😅

[rinkydevi]

hey @Huxpro i would love to work on this issue , please assign me this issue and i can proceed for this