Merge pull request rails#43045 from sandip-mane/array-syntax-consistancy

Makes the array syntax consistent with other use cases

Author: rafaelfranca

activestorage/db/migrate/20170806125915_create_active_storage_tables.rb

@@ -32,15 +32,15 @@ def change
         t.datetime :created_at, null: false
       end
 
-      t.index [ :record_type, :record_id, :name, :blob_id ], name: "index_active_storage_attachments_uniqueness", unique: true
+      t.index [ :record_type, :record_id, :name, :blob_id ], name: :index_active_storage_attachments_uniqueness, unique: true
       t.foreign_key :active_storage_blobs, column: :blob_id
     end
 
     create_table :active_storage_variant_records, id: primary_key_type do |t|
       t.belongs_to :blob, null: false, index: false, type: foreign_key_type
       t.string :variation_digest, null: false
 
-      t.index %i[ blob_id variation_digest ], name: "index_active_storage_variant_records_uniqueness", unique: true
+      t.index [ :blob_id, :variation_digest ], name: :index_active_storage_variant_records_uniqueness, unique: true
       t.foreign_key :active_storage_blobs, column: :blob_id
     end
   end