x/tools/gopls: support folding regions in block comments

[stamblerre]

See the issue in the vscode-go repository: golang/vscode-go#1511.

Is your feature request related to a problem? Please describe.

I want to be able to comment out large portions of tests and then collapse them.

I tried the obvious (select a region and cmd+/), but that doesn't work:
microsoft/vscode#124104 (comment)

Describe the solution you'd like
either cmd-/ + folding works, or toggle block comment + folding works

Describe alternatives you've considered
I filed microsoft/vscode#124104

Additional context

[ShoshinNikita]

I don't think it's a gopls issue. Rather, it's the unfortunate default behavior of VS Code. There's an option editor.comments.ignoreEmptyLines to toggle comments even for empty lines:

[stamblerre]

Thanks for finding that, @ShoshinNikita! @jsoref, does that resolve the issue for you?

[jsoref]

I guess? It seems like it's designed for this use case (and applies evenly across the platform).

I pretty much never use this feature (perhaps because I've never trusted an IDE to be remotely smart, and this reenforces that opinion). (I tried it because colleagues were using it, and I needed to perform a routine task of isolating test cases until I could figure out which ones were failing.) (I'm actually quite impressed w/ VSC in general, and am using it to replace Notepad or similar.)

I expect I'm more likely to not use the comment-lines feature at all and return to manually adding /*...*/ around blocks.

[stamblerre]

Ok, thanks for following up. Looks like this setting resolves the issue, so I will close this, as well as the upstream issue.