icingaweb2-module-businessprocess/application/views/scripts/process/source.phtml

<div class="controls">
<span style="float:right; margin-right: 1em; margin-top: 0.5em;">
<a href="<?= $this->href('businessprocess/process/show', array(
    'bp' => $this->bpname
)) ?>">Render</a>
</span>
<?= $this->tabs ?>
</div>
<pre>
<?php

$cnt = 0;
$lines = preg_split('~\r?\n~', $this->source);
$len = ceil(log(count($lines), 10));

foreach ($lines as $line) {
    $cnt++;
    printf("%0" . $len . "d: %s\n", $cnt, $this->escape($line));
}

?>
</pre>