More updates and cleanup to nvim config

.config/nvim/after/plugin/neotest.lua

@@ -4,6 +4,17 @@ end
 
 local nnoremap = require('halfdan.keymap').nnoremap
 local neotest = require('neotest')
+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)
 
 neotest.setup({
   log_level = vim.log.levels.DEBUG,
@@ -14,6 +25,7 @@ neotest.setup({
     }),
     require("neotest-rust"),
     --    require("neotest-vim-test")({ allow_file_types = { "haskell"} }),
+    require("neotest-golang")
   },
 })