/usr/lib/ruby/vendor_ruby/web_console/templates/_prompt_box_markup.html.erb is in ruby-web-console 2.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | <span class='console-prompt-label'></span>
<pre class='console-prompt-display'></pre>
|