add question_answer in pdf and change local for optional field

app/views/dossiers/show.pdf.prawn

@@ -201,6 +201,10 @@ end
 def add_avis(pdf, avis)
   format_in_2_lines(pdf, "Avis de #{avis.email_to_display}#{avis.confidentiel? ? ' (confidentiel)' : ''}",
     avis.answer || 'En attente de réponse')
+
+  if avis.question_answer.present?
+    format_in_2_columns(pdf, "Réponse oui/non ", t("question_answer.#{avis.question_answer}", scope: 'helpers.label'))
+  end
 end
 
 def add_etat_dossier(pdf, dossier)

config/locales/models/avis/en.yml

@@ -16,7 +16,7 @@ en:
       revoke: Revoke opinion request
       remind: Remind the expert
       question_label: Ask a question to the expert
-      question_label_hint: (optional field) the expert could answer by yes/no
+      question_label_hint: (optional) the expert could answer by yes/no
       introduction: Introduction message
       question_answer:
         true: 'yes'

config/locales/models/avis/fr.yml

@@ -16,7 +16,7 @@ fr:
       revoke: Révoquer la demande d’avis
       remind: Relancer l’expert
       question_label: Posez une question à l'expert
-      question_label_hint: (champ optionnel) l'expert pourra répondre par oui/non
+      question_label_hint: (facultatif) l'expert pourra répondre par oui/non
       introduction: Message d'introduction
       question_answer:
         true: oui