dossiers: fix dossier_vide with drop_down_list

Previously a drop-down list with an ["Autre", "__other__"] value crashed
the PDF generation.

app/views/dossiers/dossier_vide.pdf.prawn

@@ -26,7 +26,10 @@ def format_in_2_columns(pdf, label)
   pdf.text "\n"
 end
 
-def format_with_checkbox(pdf, label, offset = 0)
+def format_with_checkbox(pdf, option, offset = 0)
+  # Option is a [text, value] pair, or a string used for both.
+  label = option.is_a?(String) ? option : option.first
+
   pdf.font 'marianne', size: 9 do
     pdf.stroke_rectangle [0 + offset, pdf.cursor], 10, 10
     pdf.text_box label, at: [15 + offset, pdf.cursor]

spec/factories/procedure.rb

@@ -202,6 +202,12 @@ FactoryBot.define do
       end
     end
 
+    trait :with_drop_down_list do
+      after(:build) do |procedure, _evaluator|
+        build(:type_de_champ_drop_down_list, :with_other, procedure: procedure)
+      end
+    end
+
     trait :with_address do
       after(:build) do |procedure, _evaluator|
         build(:type_de_champ_address, procedure: procedure)

spec/factories/type_de_champ.rb

@@ -92,6 +92,9 @@ FactoryBot.define do
       trait :without_selectable_values do
         drop_down_list_value { "\r\n--separateur--\r\n--separateur 2--\r\n \r\n" }
       end
+      trait :with_other do
+        drop_down_other { true }
+      end
     end
     factory :type_de_champ_multiple_drop_down_list do
       type_champ { TypeDeChamp.type_champs.fetch(:multiple_drop_down_list) }

spec/views/dossiers/dossier_vide.pdf.prawn_spec.rb

@@ -1,5 +1,5 @@
 describe 'dossiers/dossier_vide.pdf.prawn', type: :view do
-  let(:procedure) { create(:procedure, :with_all_champs) }
+  let(:procedure) { create(:procedure, :with_all_champs, :with_drop_down_list) }
   let(:dossier) { create(:dossier, procedure: procedure) }
 
   before do