bugfix: don't concatenate list with string directly

modules/ffpb.py

@@ -847,7 +847,7 @@ def ffpb_remoteexec(bot, trigger):
         target,
         target_cmd,
     ]
-    print("REMOTE EXEC = " + cmd)
+    print("REMOTE EXEC = " + str(cmd))
     try:
         # call SSH
         result = subprocess.check_output(