fix test crashing when no input is given, clean up output prints a bit

coincells.cpp

@@ -79,7 +79,7 @@ std::vector<std::unique_ptr<CoinCell>> asign_coincells(std::vector<uint16_t> cel
 			std::pair<int, channel_t> addr = multiplexers->getAddress(id);
 			Log(Log::INFO, false, false)<<" Mulitplexer "<<addr.first<<" channel "<<Multiplexers::chToString(addr.second)<<", ";
 		}
-		Log(Log::INFO, false)<<'\n';
+		Log(Log::INFO, false, false)<<'\n';
 	}
 
 	return coinCells;

heater.cpp

@@ -74,6 +74,7 @@ void Heaters::recoverDevice(int device)
 	{
 		coincellhell_reset_bus(&devices[device].device);
 		coincellhell_disconnect(&devices[device].device);
+		sleep(10);
 		ret = coincellhell_connect(&devices[device].device, devices[device].serial);
 		if(watchdogs)
 			coincellhell_enable_watchdog(&devices[device].device);

test.cpp

@@ -100,7 +100,10 @@ int main(int argc, char** argv)
 
 		while(true)
 		{
-			std::string line = std::string(readline("> "));
+			const char* linePtr =  readline("> ");
+			if(!linePtr)
+				continue;
+			std::string line = std::string(linePtr);
 
 			if(line.empty())
 				continue;