repo/diff: fix line number in split view template (#4584)

templates/repo/diff/box.tmpl

@@ -99,14 +99,12 @@
 																<pre><code class="{{if $highlightClass}}language-{{$highlightClass}}{{else}}nohighlight{{end}}">{{$section.ComputedInlineDiffFor $line}}</code></pre>
 															</td>
 														{{else}}
-															<td class="lines-num lines-num-old">
-																<span rel="{{if $line.LeftIdx}}diff-{{Sha1 $file.Name}}L{{$line.LeftIdx}}{{end}}">{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}</span>
+															<td class="lines-num lines-num-old" {{if $line.LeftIdx}} id="diff-{{Sha1 $file.Index}}L{{$line.LeftIdx}}" data-line-number="{{$line.LeftIdx}}"{{end}}>
 															</td>
 															<td class="lines-code halfwidth">
 																<pre><code class="wrap {{if $highlightClass}}language-{{$highlightClass}}{{else}}nohighlight{{end}}">{{if $line.LeftIdx}}{{$section.ComputedInlineDiffFor $line}}{{end}}</code></pre>
 															</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>
+															<td class="lines-num lines-num-new" {{if $line.RightIdx}} id="diff-{{Sha1 $file.Index}}R{{$line.RightIdx}}" data-line-number="{{$line.RightIdx}}"{{end}}>
 															</td>
 															<td class="lines-code halfwidth">
 																<pre><code class="wrap {{if $highlightClass}}language-{{$highlightClass}}{{else}}nohighlight{{end}}">{{if $line.RightIdx}}{{$section.ComputedInlineDiffFor $line}}{{end}}</code></pre>