ai :: BacktrackSolver :: steps_limit
	# Limit in the number of steps for a `run`.
	#
	# One can modify this value then `run` or just call `run_steps`.
	#
	# Use 0 for no limit.
	# Default: 0
	var steps_limit = 0 is writable
					lib/ai/backtrack.nit:150,2--156,32