/usr/share/php/data/ApiGen/theme-default/source.latte is in php-apigen-theme-default 1.0.2+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | {layout '@layout.latte'}
{var $robots = false}
{block title}File {$fileName}{/block}
{block content}
{var $lineRegex = '~<span class="line">(\\s*(\\d+):\\s*)</span>([^\\n]*(?:\\n|$))~'}
<pre class="numbers"><code>{$source|replaceRE:$lineRegex,'<span class="l"><a href="#$2">$1</a></span>'|noescape}</code></pre>
<pre class="code"><code>{$source|replaceRE:$lineRegex,'<span id="$2" class="l">$3</span>'|noescape}</code></pre>
{/block}
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