Fix typo

templates/submission.hamlet

@@ -1,5 +1,5 @@
 $maybe arCid <- mArCid
-  <sec>
+  <section style="padding-bottom:1em; margin-bottom:1em; border-bottom:1px solid black;">
     <h2>
       <a href=@{CSheetR tid csh shn (SubmissionDownloadArchiveR arCid)}>Archiv
     $forall (name,time) <- lastEdits
@@ -8,8 +8,6 @@ $maybe arCid <- mArCid
       <h3>Enthaltene Dateien:
       ^{fileTable}
 
-    <hr>
-
-<sec>
+<section>
   <form .form-horizontal method=post action=@{actionUrl} enctype=#{formEnctype}>
    ^{formWidget}