Put back the quiet assets in development:

- This was removed in 0f43fed.
  This option is supported by propshaft.

  Currently, the terminal is clutted with assets request log.

railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt

@@ -64,6 +64,11 @@ Rails.application.configure do
   # Highlight code that enqueued background job in logs.
   config.active_job.verbose_enqueue_logs = true
 
+  <%- end -%>
+  <%- unless options[:skip_asset_pipeline] -%>
+  # Suppress logger output for asset requests.
+  config.assets.quiet = true
+
   <%- end -%>
   # Raises error for missing translations.
   # config.i18n.raise_on_missing_translations = true

railties/test/generators/app_generator_test.rb

@@ -600,6 +600,11 @@ def test_inclusion_of_rubocop
     assert_file "config/environments/development.rb", %r|# Apply autocorrection by RuboCop to files generated by `bin/rails generate`\.|
   end
 
+  def test_quiet_assets_in_development
+    run_generator
+    assert_file "config/environments/development.rb", /config\.assets.quiet = true/
+  end
+
   def test_rubocop_is_skipped_if_required
     run_generator [destination_root, "--skip-rubocop"]