README config example fails in neovim 0.11 with `Vim:E730: Using a List as a String`

[miguno]

First, thanks for your work on this project!

I have been using it on-and-off for a while, and after picking up Elixir after a break I noticed that I could no longer run tests via neotests. It worked before, so I suppose there was some change that introduced this problem recently (maybe in neovim 0.11?).

Problem description

Whenever my cursor is inside an Elixir test and I trigger neotest-elixir, the following error is shown by neovim:

Vim:E730: Using a List as a String

I could trace the problem back to my neotest-elixir configuration, and it turns out the current project README has the same problem.

Problematic line from README:

    require("neotest-elixir")({
      -- The Mix task to use to run the tests
      -- Can be a function to return a dynamic value.
      -- Default: "test"
      mix_task = {"my_custom_task"}, -- <== HERE

Fix:

    require("neotest-elixir")({
      -- The Mix task to use to run the tests
      -- Can be a function to return a dynamic value.
      -- Default: "test"
      mix_task = "my_custom_task", -- <== HERE

Environment

• macOS (Apple Silicon)
• neovim 0.11.0
• neotest-elixir at commit a242aeb