/usr/share/doc/ruby-erubis/examples/ is in ruby-erubis 2.7.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/ruby-erubis/examples/basic/
/usr/share/doc/ruby-erubis/examples/basic/Makefile
/usr/share/doc/ruby-erubis/examples/basic/example.ec
/usr/share/doc/ruby-erubis/examples/basic/example.ecpp
/usr/share/doc/ruby-erubis/examples/basic/example.ejava
/usr/share/doc/ruby-erubis/examples/basic/example.ejs
/usr/share/doc/ruby-erubis/examples/basic/example.eperl
/usr/share/doc/ruby-erubis/examples/basic/example.ephp
/usr/share/doc/ruby-erubis/examples/basic/example.eruby
/usr/share/doc/ruby-erubis/examples/basic/example.escheme
/usr/share/doc/ruby-erubis/examples/pi/
/usr/share/doc/ruby-erubis/examples/pi/Makefile
/usr/share/doc/ruby-erubis/examples/pi/example.ec
/usr/share/doc/ruby-erubis/examples/pi/example.ejava
/usr/share/doc/ruby-erubis/examples/pi/example.ejs
/usr/share/doc/ruby-erubis/examples/pi/example.eperl
/usr/share/doc/ruby-erubis/examples/pi/example.ephp
/usr/share/doc/ruby-erubis/examples/pi/example.eruby
/usr/share/doc/ruby-erubis/examples/pi/example.escheme