Wrong edit range for param completions

How are you using the lua-language-server?

NeoVim

Which OS are you using?

Linux

What is the issue affecting?

Completion

Expected Behaviour

For parameters that can either be a single value or a list T|T[], when already in a table, the completion range should not include surrounding curly braces.

Actual Behaviour

The completion edit range provided by lua-language-server for parameters seems to always include the entire parameter, which causes issues when completing params that can be either a single value or a list, for example, T|T[].

Reproduction steps

1. Create test.lua in the test dir with the following content:

   ---@alias my_type 'a'|'b'
   
   ---@param arg my_type|my_type[]
   local function test_func(arg)
     return arg
   end
   

2. Use neovim to edit test.lua
3. Try to call test_func at the end of the file with a list parameter: test_func({ ... })
4. Completions provided by lua-language-server are shown inside the curly braces
5. Selecting one of the completions replaces the whole parameter, including the surrounding curly braces.

https://github.com/user-attachments/assets/d69214e9-b069-4554-b4ab-770e2fb50632

Additional Notes

I have also reported to the blink.cmp but the maintainer thinks that it is a lua-language-server's issue: https://github.com/Saghen/blink.cmp/issues/2179

Log File

No response

Reproduisez le problème à l’aide de l’exemple test.lua et de Neovim, en vous concentrant sur les plages de modification de la complétion pour un paramètre typé comme my_type|my_type[]. Suivez la manière dont la plage de complétion est calculée lorsque l’argument se trouve entre accolades. Le travail est terminé lorsque la sélection d’une complétion remplace uniquement la valeur entre les accolades et préserve la syntaxe de liste environnante.