Autofix Rubocop RSpec/ImplicitSubject (#23721)

spec/lib/plain_text_formatter_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe PlainTextFormatter do
       let(:status) { Fabricate(:status, text: '<p>a text by a nerd who uses an HTML tag in text</p>', uri: nil) }
 
       it 'returns the raw text' do
-        is_expected.to eq '<p>a text by a nerd who uses an HTML tag in text</p>'
+        expect(subject).to eq '<p>a text by a nerd who uses an HTML tag in text</p>'
       end
     end
 
@@ -17,7 +17,7 @@ RSpec.describe PlainTextFormatter do
       let(:status) { Fabricate(:status, account: remote_account, text: '<p>Hello</p><script>alert("Hello")</script>') }
 
       it 'returns tag-stripped text' do
-        is_expected.to eq 'Hello'
+        expect(subject).to eq 'Hello'
       end
     end
   end