fix(textarea): merge data controllers from opts & autoresize

app/components/dsfr/input_errorable.rb

@@ -98,9 +98,7 @@ module Dsfr
           })
         end
 
-        if autoresize?
-          @opts.deep_merge!(data: { controller: 'autoresize' })
-        end
+        @opts.deep_merge!(data: { controller: token_list(@opts.dig(:data, :controller), 'autoresize' => autoresize?) })
 
         @opts
       end

spec/system/administrateurs/procedure_attestation_template_spec.rb

@@ -142,7 +142,7 @@ describe 'As an administrateur, I want to manage the procedure’s attestation',
       }
 
       fill_in "Contenu du pied de page", with: ["line1", "line2", "line3", "line4"].join("\n")
-      expect(page).to have_field("Contenu du pied de page", with: "line1\nline2\nline3\nline4")
+      expect(page).to have_field("Contenu du pied de page", with: "line1\nline2\nline3line4")
 
       click_on "Publier"
       expect(attestation.reload).to be_published