Fix `Lint/NonLocalExitFromIterator` cop in JSON-LD helper (#34948)

.rubocop_todo.yml

@@ -6,10 +6,6 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-Lint/NonLocalExitFromIterator:
-  Exclude:
-    - 'app/helpers/json_ld_helper.rb'
-
 # Configuration parameters: AllowedMethods, AllowedPatterns, CountRepeatedAttributes.
 Metrics/AbcSize:
   Max: 82

app/helpers/json_ld_helper.rb

@@ -134,7 +134,7 @@ module JsonLdHelper
         patch_for_forwarding!(value, compacted_value)
       elsif value.is_a?(Array)
         compacted_value = [compacted_value] unless compacted_value.is_a?(Array)
-        return if value.size != compacted_value.size
+        return nil if value.size != compacted_value.size
 
         compacted[key] = value.zip(compacted_value).map do |v, vc|
           if v.is_a?(Hash) && vc.is_a?(Hash)

spec/helpers/json_ld_helper_spec.rb

@@ -180,6 +180,14 @@ RSpec.describe JsonLdHelper do
         expect(compacted.dig('object', 'tag', 0, 'href')).to eq ['foo']
         expect(safe_for_forwarding?(json, compacted)).to be true
       end
+
+      context 'when array size mismatch exists' do
+        subject { helper.patch_for_forwarding!(json, alternate) }
+
+        let(:alternate) { json.merge('to' => %w(one two three)) }
+
+        it { is_expected.to be_nil }
+      end
     end
 
     describe 'safe_for_forwarding?' do