Added space | stetic details

src/MQUnifiedsensor.cpp

@@ -59,7 +59,7 @@ void MQUnifiedsensor::serialDebug(bool onSetup)
     Serial.print("RL: "); Serial.print(_RL); Serial.println(" KΩ");
 
     Serial.print("Model: "); if(_regressionMethod == "Exponential") Serial.println("Exponential"); else Serial.println("Linear");
-    Serial.print(_type + " -> " + "a:"); Serial.print(_a); Serial.print(" | b:"); Serial.println(_b);
+    Serial.print(_type + " -> " + "a: "); Serial.print(_a); Serial.print(" | b: "); Serial.println(_b);
 
     Serial.println("Development board: " + _placa);
   }