`vim.ui.select` error creating window when some string sent by the language server contains newline

[goolord]

Describe the bug dressing.nvim can fail to create a window when some string the language server sends contains newlines. this bug is also present in https://github.com/nvim-telescope/telescope-ui-select.nvim/issues/19

System information

• OS: mac
• Neovim version: v0.9.0-dev-2126+g84328bae0-dirty
• Telescope backend
• Dressing config:

require("dressing").setup()

To Reproduce Steps to reproduce the behavior:

1. enter a project that does not build with HLS
2. wait for haskell language server to send error message + retry option

If possible, provide a minimal file that will trigger the issue (see tests/manual for examples of short ways to call vim.ui.*):

minimal code here

Screenshots vanilla vim.ui.select:

dressing.nvim vim.ui.select:

[stevearc]

Fixed!