Fix Split-View line adjustment (#4622)

The $-function is unreachable in the previous implementation because jQuery is
not loaded yet. I fix this by executing the function after the content is
loaded, so jQuery is loaded at the time of execution and the call will not fail
anymore.

Signed-off-by: Felix Nehrke <felix@nehrke.info>

templates/repo/diff/box.tmpl

@@ -200,7 +200,7 @@
 
 	{{if .IsSplitStyle}}
 		<script>
-			(function() {
+			document.addEventListener('DOMContentLoaded', function() {
 				$('tr.add-code').each(function() {
 					var prev = $(this).prev();
 					if(prev.is('.del-code') && prev.children().eq(3).text().trim() === '') {
@@ -217,7 +217,7 @@
 						$(this).remove();
 					}
 				});
-			}());
+			});
 		</script>
 	{{end}}
 {{end}}