/usr/share/doc/lua50/ is in lua50 5.0.3-7.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/lua50/NEWS.Debian.gz
/usr/share/doc/lua50/changelog.Debian.gz
/usr/share/doc/lua50/copyright
/usr/share/doc/lua50/examples/
/usr/share/doc/lua50/examples/README
/usr/share/doc/lua50/examples/bisect.lua
/usr/share/doc/lua50/examples/cf.lua
/usr/share/doc/lua50/examples/echo.lua
/usr/share/doc/lua50/examples/env.lua
/usr/share/doc/lua50/examples/factorial.lua
/usr/share/doc/lua50/examples/fib.lua
/usr/share/doc/lua50/examples/fibfor.lua
/usr/share/doc/lua50/examples/globals.lua
/usr/share/doc/lua50/examples/hello.lua
/usr/share/doc/lua50/examples/life.lua
/usr/share/doc/lua50/examples/luac.lua
/usr/share/doc/lua50/examples/printf.lua
/usr/share/doc/lua50/examples/readonly.lua
/usr/share/doc/lua50/examples/sieve.lua
/usr/share/doc/lua50/examples/sort.lua
/usr/share/doc/lua50/examples/table.lua
/usr/share/doc/lua50/examples/trace-calls.lua
/usr/share/doc/lua50/examples/trace-globals.lua
/usr/share/doc/lua50/examples/undefined.lua
/usr/share/doc/lua50/examples/xd.lua