More lint fixes

app/controllers/settings/theme_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Settings::ThemeController < ApplicationController
   include ThemeHelper
 

app/controllers/user_controller.rb

@@ -1,5 +1,5 @@
 class UserController < ApplicationController
-  before_action :authenticate_user!, only: %w(edit update edit_privacy update_privacy data export begin_export edit_security update_2fa destroy_2fa reset_user_recovery_codes edit_mute)
+  before_action :authenticate_user!, only: %w[edit update edit_privacy update_privacy data export begin_export edit_security update_2fa destroy_2fa reset_user_recovery_codes edit_mute]
 
   def show
     @user = User.where('LOWER(screen_name) = ?', params[:username].downcase).includes(:profile).first!

spec/controllers/settings/theme_controller_spec.rb

@@ -56,7 +56,7 @@ describe Settings::ThemeController, type: :controller do
 
       context "user has no theme" do
         it "creates a new theme" do
-          expect { subject }.to change { user.reload.theme }
+          expect { subject }.to(change{ user.reload.theme })
         end
 
         it "renders the edit template" do
@@ -70,7 +70,7 @@ describe Settings::ThemeController, type: :controller do
         let(:theme) { FactoryBot.create(:theme, user: user) }
 
         it "updates the theme" do
-          expect { subject }.to change { theme.reload.attributes }
+          expect { subject }.to(change{ theme.reload.attributes })
         end
 
         it "renders the edit template" do