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

Reproduziere das Problem anhand des Beispiels test.lua und Neovim, wobei du dich auf die Bearbeitungsbereiche der Vervollständigung für einen Parameter mit dem Typ my_type|my_type[] konzentrierst. Verfolge, wie der Vervollständigungsbereich berechnet wird, wenn sich das Argument innerhalb geschweifter Klammern befindet. Als abgeschlossen gilt die Aufgabe, wenn die Auswahl einer Vervollständigung nur den Wert innerhalb der Klammern ersetzt und die umgebende Listensyntax erhält.