The currently established convention uses `NS` for "translation no-ops", i.e., it will be collected by a string-collecting utility but not be translated by Luanti at this place.
We don't want to mislead modders with this example into using `NS` for plural forms instead, breaking with the established convention and making use of automated tools harder.
See also: https://github.com/minetest/modtools/pull/11
ba63c1505a
