fix typo mistake

templates/repo/diff.tmpl

@@ -109,7 +109,7 @@
                         {{range $k, $line := .Lines}}
                         <tr class="{{DiffLineTypeToStr .Type}}-code nl-{{$k}} ol-{{$k}}">
                             <td class="lines-num lines-num-old">
-                                <span rel="{{if $line.LeftIdx}}diff-L{{Sha1 $file.Name}}{{$line.LeftIdx}}{{end}}">{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}</span>
+                                <span rel="{{if $line.LeftIdx}}diff-{{Sha1 $file.Name}}L{{$line.LeftIdx}}{{end}}">{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}</span>
                             </td>
                             <td class="lines-num lines-num-new">
                                 <span rel="{{if $line.RightIdx}}diff-{{Sha1 $file.Name}}R{{$line.RightIdx}}{{end}}">{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}</span>