diff --git a/1-getting-started/lessons/3-sensors-and-actuators/pi-sensor.md b/1-getting-started/lessons/3-sensors-and-actuators/pi-sensor.md
index b327c064..f4af4d18 100644
--- a/1-getting-started/lessons/3-sensors-and-actuators/pi-sensor.md
+++ b/1-getting-started/lessons/3-sensors-and-actuators/pi-sensor.md
@@ -19,7 +19,7 @@ Connect the light sensor
 ![A grove light sensor](../../../images/grove-light-sensor.png)
 
 1. Insert one end of a Grove cable into the socket on the light sensor module. It will only go in one way round.
-1. 
+
 1. With the Raspberry Pi powered off, connect the other end of the Grove cable to the analog socket marked **A0** on the Grove Base hat attached to the Pi. This socket is the second from the right, on the row of sockets next to the GPIO pins.
 
 ![The grove light sensor connected to socket A0](../../../images/pi-light-sensor.png)