Diff: Fix indentation on unhighlighted code (#7435)

There was a missing space before the `nohighlight` class which made the
previous class concatenate wrongly as `wrapnohighlight` in the template.

templates/repo/diff/box.tmpl

@@ -122,10 +122,10 @@
 													<tr class="{{DiffLineTypeToStr .GetType}}-code nl-{{$k}} ol-{{$k}}">
 														<td class="lines-num lines-num-old" data-line-num="{{if $line.LeftIdx}}{{$line.LeftIdx}}{{end}}"><span rel="{{if $line.LeftIdx}}diff-{{Sha1 $file.Name}}L{{$line.LeftIdx}}{{end}}"></span></td>
 														<td class="lines-type-marker lines-type-marker-old">{{if $line.LeftIdx}}<span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span>{{end}}</td>
-														<td class="lines-code lines-code-old halfwidth">{{if and $.SignedUserID $line.CanComment $.PageIsPullFiles (not (eq .GetType 2))}}<a class="ui green button add-code-comment add-code-comment-left" data-path="{{$file.Name}}" data-side="left" data-idx="{{$line.LeftIdx}}">+</a>{{end}}<span class="mono wrap{{if $highlightClass}} language-{{$highlightClass}}{{else}}nohighlight{{end}}">{{if $line.LeftIdx}}{{$section.GetComputedInlineDiffFor $line}}{{end}}</span></td>
+														<td class="lines-code lines-code-old halfwidth">{{if and $.SignedUserID $line.CanComment $.PageIsPullFiles (not (eq .GetType 2))}}<a class="ui green button add-code-comment add-code-comment-left" data-path="{{$file.Name}}" data-side="left" data-idx="{{$line.LeftIdx}}">+</a>{{end}}<span class="mono wrap{{if $highlightClass}} language-{{$highlightClass}}{{else}} nohighlight{{end}}">{{if $line.LeftIdx}}{{$section.GetComputedInlineDiffFor $line}}{{end}}</span></td>
 														<td class="lines-num lines-num-new" data-line-num="{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}"><span rel="{{if $line.RightIdx}}diff-{{Sha1 $file.Name}}R{{$line.RightIdx}}{{end}}"></span></td>
 														<td class="lines-type-marker lines-type-marker-new">{{if $line.RightIdx}}<span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span>{{end}}</td>
-														<td class="lines-code lines-code-new halfwidth">{{if and $.SignedUserID $line.CanComment $.PageIsPullFiles (not (eq .GetType 3))}}<a class="ui green button add-code-comment add-code-comment-right" data-path="{{$file.Name}}" data-side="right" data-idx="{{$line.RightIdx}}">+</a>{{end}}<span class="mono wrap{{if $highlightClass}} language-{{$highlightClass}}{{else}}nohighlight{{end}}">{{if $line.RightIdx}}{{$section.GetComputedInlineDiffFor $line}}{{end}}</span></td>
+														<td class="lines-code lines-code-new halfwidth">{{if and $.SignedUserID $line.CanComment $.PageIsPullFiles (not (eq .GetType 3))}}<a class="ui green button add-code-comment add-code-comment-right" data-path="{{$file.Name}}" data-side="right" data-idx="{{$line.RightIdx}}">+</a>{{end}}<span class="mono wrap{{if $highlightClass}} language-{{$highlightClass}}{{else}} nohighlight{{end}}">{{if $line.RightIdx}}{{$section.GetComputedInlineDiffFor $line}}{{end}}</span></td>
 													</tr>
 													{{if gt (len $line.Comments) 0}}
 														<tr class="add-code-comment">

templates/repo/diff/section_unified.tmpl

@@ -12,7 +12,7 @@
 			<td class="lines-num lines-num-new" data-line-num="{{if $line.RightIdx}}{{$line.RightIdx}}{{end}}"><span rel="{{if $line.RightIdx}}diff-{{Sha1 $file.Name}}R{{$line.RightIdx}}{{end}}"></span></td>
 			{{end}}
 			<td class="lines-type-marker"><span class="mono" data-type-marker="{{$line.GetLineTypeMarker}}"></span></td>
-			<td class="lines-code{{if (not $line.RightIdx)}} lines-code-old{{end}}">{{if and $.root.SignedUserID $line.CanComment $.root.PageIsPullFiles}}<a class="ui green button add-code-comment add-code-comment-{{if $line.RightIdx}}right{{else}}left{{end}}" data-path="{{$file.Name}}" data-side="{{if $line.RightIdx}}right{{else}}left{{end}}" data-idx="{{if $line.RightIdx}}{{$line.RightIdx}}{{else}}{{$line.LeftIdx}}{{end}}">+</a>{{end}}<span class="mono wrap{{if $highlightClass}} language-{{$highlightClass}}{{else}}nohighlight{{end}}">{{$section.GetComputedInlineDiffFor $line}}</span></td>
+			<td class="lines-code{{if (not $line.RightIdx)}} lines-code-old{{end}}">{{if and $.root.SignedUserID $line.CanComment $.root.PageIsPullFiles}}<a class="ui green button add-code-comment add-code-comment-{{if $line.RightIdx}}right{{else}}left{{end}}" data-path="{{$file.Name}}" data-side="{{if $line.RightIdx}}right{{else}}left{{end}}" data-idx="{{if $line.RightIdx}}{{$line.RightIdx}}{{else}}{{$line.LeftIdx}}{{end}}">+</a>{{end}}<span class="mono wrap{{if $highlightClass}} language-{{$highlightClass}}{{else}} nohighlight{{end}}">{{$section.GetComputedInlineDiffFor $line}}</span></td>
 		</tr>
 		{{if gt (len $line.Comments) 0}}
 		<tr>