clean up

docs/assignments/week12.md

@@ -378,6 +378,7 @@ Now I decided to add some code to make the onboard RGB color change based on the
 using on the RP2040 Xiao onboard neopixle as follows:
 
 ```c 
+
 #include <Wire.h>
 #include <SPI.h>
 #include <Adafruit_BMP280.h>
@@ -448,7 +449,8 @@ void loop() {
 
   Serial.println();
   delay(2000);
-}```
+}
+```
 
 To show case it in the video I code an ice pack and a cup of hot water. You can see the serial monitor in the background