joystick: Replace tabs by space in example

Signed-off-by: Francois Berder <fberder@outlook.fr>

Author: francois-berder

examples/joystick_example.py

@@ -15,25 +15,25 @@
 MAXIMUM = OFFSET2
 
 def get_led_mask(perc):
-	div = int((1. - perc)led.LED_CNT)
-	if div > led.LED_CNT:
-		div = led.LED_CNT
+    div = int((1. - perc)led.LED_CNT)
+    if div > led.LED_CNT:
+        div = led.LED_CNT
 
-	mask = 0
-	for i in range(div):
-		mask |= (1 << i)
+    mask = 0
+    for i in range(div):
+        mask |= (1 << i)
 
-	return mask
+    return mask
 
 i2c.init()
 led.init()
 
 while True:
-	pos = joystick.get_position()
-	print('{} {}'.format(pos[0], pos[1]))
-	mask = get_led_mask(float(pos[0] +  OFFSET)/float(MAXIMUM))
-	led.switch_on(mask)
-	led.switch_off(~mask)
+    pos = joystick.get_position()
+    print('{} {}'.format(pos[0], pos[1]))
+    mask = get_led_mask(float(pos[0] +  OFFSET)/float(MAXIMUM))
+    led.switch_on(mask)
+    led.switch_off(~mask)
 
 i2c.release()
 led.release()