AP_BattMonitor: minor format fix to BLHeliESC

libraries/AP_BattMonitor/AP_BattMonitor_BLHeliESC.cpp

@@ -35,12 +35,12 @@ void AP_BattMonitor_BLHeliESC::read(void)
     }
 
     uint8_t num_escs = 0;
-    float voltage_sum=0;
-    float current_sum=0;
-    float consumed_sum=0;
-    float temperature_sum=0;
+    float voltage_sum = 0;
+    float current_sum = 0;
+    float consumed_sum = 0;
+    float temperature_sum = 0;
     uint32_t now = AP_HAL::millis();
-    uint32_t highest_ms=0;
+    uint32_t highest_ms = 0;
 
     for (uint8_t i=0; i<AP_BLHELI_MAX_ESCS; i++) {
         AP_BLHeli::telem_data td;