Fix Layout/SpaceInsidePercentLiteralDelimiters rubocop issue and remove from rubocop todo list

.rubocop_todo.yml

@@ -647,12 +647,6 @@ Layout/SpaceInsideParens:
     - 'spec/features/proposals_spec.rb'
     - 'spec/models/abilities/moderator_spec.rb'
 
-# Offense count: 2
-# Cop supports --auto-correct.
-Layout/SpaceInsidePercentLiteralDelimiters:
-  Exclude:
-    - 'app/models/activity.rb'
-
 # Offense count: 9
 # Cop supports --auto-correct.
 # Configuration parameters: IgnoredMethods.

app/models/activity.rb

@@ -2,7 +2,7 @@ class Activity < ActiveRecord::Base
   belongs_to :actionable,  -> { with_hidden }, polymorphic: true
   belongs_to :user, -> { with_hidden }
 
-  VALID_ACTIONS = %w( hide block restore valuate )
+  VALID_ACTIONS = %w(hide block restore valuate)
 
   validates :action, inclusion: {in: VALID_ACTIONS}