minetest.log - Uberi/MineTest-API GitHub Wiki
loglevel one of "error", "action", "info", "verbose", if line is nil then line=loglevel
log([string](../type/string.html) loglevel, [[string](../type/string.html) line])
Example 1:
minetest.log("Something happened!")
Example 2:
minetest.log("action", "Someone did something!")