Add multirange support to range formatting

[c-claeys]

Add multiRange support to the rangeFormatting method with a new list field in the request.

See also #1536

[c-claeys]

@dbaeumer Let me know if you have any questions or concerns about this. I have commits partially completed to add support for this in both https://github.com/microsoft/vscode and https://github.com/microsoft/vscode-languageserver-node but they depend on choices made here.

[dbaeumer]

@c-claeys thanks for the PR. In general we don't add things to the specification without have an (prototype) implementation at least for one editor.

I suggest that you continue with ranges and have an implementation in VS Code and the LSP nodes modules. If these implementations seem solid then we can start specing the behaviour.

[dbaeumer]

I will close the PR for now. We can reopen it when there is an implementation for at least one editor.

[tom-anders]

I will close the PR for now. We can reopen it when there is an implementation for at least one editor.

Since it has been implemented in microsoft/vscode#163190 now, can we reopen this issue?

[dbaeumer]

I can't since the fork for the PR got deleted.

[tom-anders]

@c-claeys Are you interested in updating this PR or opening a new one?

[c-claeys]

I'll open a new one. I think the old approach differed qualitatively from where we landed for the VSCode API. I deleted the fork too (looks like it's a support pain to restore).