# Parse zero or more space characters, incuding at most one newline
	private fun spnl: Bool do
		var found_nl = false
		loop
			var c = peek
			if c == ' ' or c == '\t' then
				advance 1
				continue
			else if c == '\n' then
				if found_nl then break
				found_nl = true
				advance 1
				continue
			end
			break
		end
		return true
	end