nextcloud/apps/files_versions/templates/history.php

<div id="history">
<?php
	if(isset($_['message'])){


	        if(isset($_['path'])) echo('<strong>File: '.$_['path']).'</strong><br>';
	        echo('<strong>'.$_['message']).'</strong><br>';

	}else{

	        echo('<strong>Versions of '.$_['path']).'</strong><br>';
	        echo('<p><em>You can click on the revert button to revert to the specific verson.</em></p><br />');
	        foreach ( $_['versions'] as $v ){
	        
			echo ' ';
			echo OC_Util::formatDate( $v );
			echo ' <a href="history.php?path='.urlencode( $_['path'] ).'&revert='. $v .'" class="button">Revert</a><br /><br />';
			
		}

	}

?>
</div>