Extract the changed event into a module function

Author: ndreas

lua/diagnostic.lua

@@ -87,11 +87,12 @@ function M.publish_diagnostics(bufnr)
     util.buf_diagnostics_virtual_text(bufnr, result.diagnostics)
   end
   M.diagnostics_loclist(result)
+  M.trigger_diagnostics_changed()
+end
 
-  vim.schedule_wrap(function()
+M.trigger_diagnostics_changed = vim.schedule_wrap(function()
     vim.api.nvim_command("doautocmd User LspDiagnosticsChanged")
-  end)()
-end
+end)
 
 function M.refresh_diagnostics()
   local bufnr = vim.api.nvim_win_get_buf(0)