Fix most rubocop issues (#2165)

* Run rubocop --autocorrect on app/, config/ and lib/, also manually fix some remaining style issues

* Run rubocop --autocorrect-all on db/

* Run rubocop --autocorrect-all on `spec/` and fix remaining issues

lib/tasks/assets.rake

@@ -3,14 +3,14 @@
 namespace :assets do
   desc 'Generate static pages'
   task generate_static_pages: :environment do
-    class StaticApplicationController < ApplicationController
-      def current_user
-        nil
-      end
-    end
-
     def render_static_page(action, dest:, **opts)
-      html = StaticApplicationController.render(action, opts)
+      renderer = Class.new(ApplicationController) do
+        def current_user
+          nil
+        end
+      end
+
+      html = renderer.render(action, opts)
       File.write(dest, html)
     end
 

lib/tasks/glitchsoc.rake

@@ -1,8 +1,12 @@
+# frozen_string_literal: true
+
 namespace :glitchsoc do
   desc 'Backfill local-only flag on statuses table'
   task backfill_local_only: :environment do
-    Status.local.where(local_only: nil).find_each do |st|
-      ActiveRecord::Base.logger.silence { st.update_attribute(:local_only, st.marked_local_only?) }
+    Status.local.where(local_only: nil).find_each do |status|
+      ActiveRecord::Base.logger.silence do
+        status.update_attribute(:local_only, status.marked_local_only?) # rubocop:disable Rails/SkipsModelValidations
+      end
     end
   end
 end