fix: move mailer test let statements into context

Author: arkirchner

spec/mailers/report_mailer_spec.rb

@@ -6,14 +6,14 @@
   describe '#report_content' do
     subject(:mail) { described_class.with(reported_content:).report_content }
 
-    let(:question) { 'Inappropriate content for RfC.' }
-    let(:reported_content) { create(:rfc, question:) }
+    context 'when an RfC is reported' do
+      let(:question) { 'Inappropriate content for RfC.' }
+      let(:reported_content) { create(:rfc, question:) }
 
-    it 'sets the correct sender' do
-      expect(mail.from).to include('[email protected]')
-    end
+      it 'sets the correct sender' do
+        expect(mail.from).to include('[email protected]')
+      end
 
-    context 'when an RfC is reported' do
       it 'sets the correct subject' do
         expect(mail.subject).to eq(I18n.t('report_mailer.report_content.subject', content_name: RequestForComment.model_name.human))
       end