Add inlay hint for omitted hash values

[RyanBrushett]

Motivation

In this discussion, @andyw8 mentions how we could add an inlay hint for an omitted hash value to be a bit clearer about what's going on.

Implementation

• Followed how the inlay hint for implied rescue StandardError works
• I added an example but it's kind of hard to write out how it works... let me know if I could make it better
• I think there's only three Node types that node.value could be when the node is an ImplicitNode but let me know if I'm missing anything

Automated Tests

I added some expectation tests!

Manual Tests

You could test this by opening the ruby-lsp project in VS code, restart the extension so it loads the development version, and then write some code with implied hash values. This should do it:

some_variable = "hello"
{some_variable:} # hint will be added here

Also

❤️

[vinistock]

❤️

[Morriar]

Thanks!

[davidalejandroaguilar]

Thanks for this PR! However, how can we disable this? The reason I omit the value is because I don't want it to be shown 😅

(I'm guessing this PR is the one that added this):

EDIT: I just realized you can disable inlayHint, however, that might disable ALL inlay hints, which is not desired. Only this particular hint (the one that shows omitted hash/keyword argument values) should be disabled.

[vinistock]

There's currently no way to configure inlay hints with that level of granularity. We still need to accept a more complex configuration for it.

[Petercopter]

Please add a configuration option, this is infuriating and unwanted. The whole point was to make code more clean and concise, it's frustrating that it was undone with this change.

[tonybruess]

Can we make a new issue for a configuration option here?

[vinistock]

It's already being worked on as part of #834, which is related.