Show diff on rename with diff changes (#15338) (#15340)

Backport #15338

More recent versions of git have increased support for detection of renames meaning
that a rename with diff changes is now supported.

Although ParsePatch supports this - our templates do not and the simplest solution
is simply to show the diff.

Fix #15335

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>

templates/repo/diff/box.tmpl

@@ -57,14 +57,12 @@
 				<div class="diff-file-box diff-box file-content">
 					<h4 class="ui top attached normal header rounded">
 						<div class="diff-counter count ui left">
-							{{if not $file.IsRenamed}}
 							<span class="add" data-line="{{.Addition}}">+ {{.Addition}}</span>
 							<span class="bar">
 								<div class="pull-left add"></div>
 								<div class="pull-left del"></div>
 							</span>
 							<span class="del" data-line="{{.Deletion}}">- {{.Deletion}}</span>
-							{{end}}
 						</div>
 						<span class="file">{{$file.Name}}</span>
 						<div>{{$.i18n.Tr "repo.diff.file_suppressed"}}</div>
@@ -97,7 +95,7 @@
 						<div class="diff-counter count">
 							{{if $file.IsBin}}
 								{{$.i18n.Tr "repo.diff.bin"}}
-							{{else if not $file.IsRenamed}}
+							{{else}}
 								<span class="add" data-line="{{.Addition}}">+ {{.Addition}}</span>
 								<span class="bar">
 									<div class="pull-left add"></div>
@@ -119,7 +117,6 @@
 						{{end}}
 					</h4>
 					<div class="diff-file-body ui attached unstackable table segment">
-						{{if ne $file.Type 4}}
 						<div class="file-body file-code has-context-menu code-diff {{if $.IsSplitStyle}}code-diff-split{{else}}code-diff-unified{{end}}">
 							<table class="chroma">
 								<tbody>
@@ -250,7 +247,6 @@
 								</tbody>
 							</table>
 						</div>
-						{{end}}
 					</div>
 				</div>
 			{{end}}