Remove newlines from result message

Newlines can cause trouble with translations as well as presentation in
the UI. This particular string doesn't actually need the newlines, so
this commit changes it to just not have them.

Alternative to ManageIQ/manageiq#23213

app/controllers/miq_ae_tools_controller.rb

@@ -286,11 +286,7 @@ def upload
     if params[:upload] && params[:upload][:datastore].present?
       begin
         MiqAeDatastore.upload(params[:upload][:datastore])
-        flash_to_session(_("Datastore import was successful.
-Namespaces updated/added: %{namespace_stats}
-Classes updated/added: %{class_stats}
-Instances updated/added: %{instance_stats}
-Methods updated/added: %{method_stats}") % stat_options)
+        flash_to_session(_("Datastore import was successful. Added/Updated %{namespace_stats} Namespaces, %{class_stats} Classes, %{instance_stats} Instances, %{method_stats} Methods.") % stat_options)
         redirect_to(:action => 'import_export')
       rescue StandardError => bang
         flash_to_session(_("Error during 'upload': %{message}") % {:message => bang.message}, :error)