readded size of feedback_message textfield

Author: marcelja

app/views/exercises/_test_form.html.erb

@@ -7,7 +7,7 @@
 </div>
 <div class="field">
   <%= f.label :feedback_message %><br>
-  <%= test.text_field :feedback_message %>
+  <%= test.text_field :feedback_message, size:80 %>
 </div>
 <div class="field">
   <%= f.label :testing_framework %><br>