/usr/share/perl5/Text/MicroTemplate/EncodedString.pm is in libtext-microtemplate-perl 0.20-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # the package in implemented intentionally in Text::MicroTemplate
use Text::MicroTemplate;
1;
|