fix: edition

src/templates/post.html

@@ -1,6 +1,6 @@
 {% if config.is_logged() %}
 <form action="/{% if name %}{{ post_file_id(name) }}{% endif %}" method="post">
-  <textarea name="p">{{ file }}</textarea>
+  <textarea name="p">{{ "\n".join(file) }}</textarea>
   <br />
   <button type="submit">send</button>
 </form>