feat(nvim): neotest improved diagnostics

nvim-fredrik/lua/plugins/neotest.lua

@@ -39,9 +39,20 @@ return {
         opts.adapters = adapters
       end
 
-      require("neotest").setup(opts)
+      -- get neotest namespace (api call creates or returns namespace)
+      local neotest_ns = vim.api.nvim_create_namespace("neotest")
+      vim.diagnostic.config({
+        virtual_text = {
+          format = function(diagnostic)
+            local message = diagnostic.message:gsub("\n", " "):gsub("\t", " "):gsub("%s+", " "):gsub("^%s+", "")
+            return message
+          end,
+        },
+      }, neotest_ns)
 
+      require("neotest").setup(opts)
     end,
+
     keys = require("config.keymaps").setup_neotest_keymaps(),
   },
 }