Reasonably so within linux filesystems where a file with that name might already exist, e.g. within Debian /etc/apt/sources.list is a file and /etc/apt/sources.

Reasonably so within linux filesystems where a file with that name might already exist, e.g. within Debian /etc/apt/sources.list is a file and /etc/apt/sources.list.d is a folder. There's probably a more specific convention so I'll await murphy's law.