Trim trailing whitespace from example Micropython code

i2c/1106oled/i2c_1106oled_using_defaults.py

@@ -3,7 +3,6 @@ from machine import I2C, ADC
 from sh1106 import SH1106_I2C
 import framebuf
 
-
 WIDTH  = 128                                            # oled display width
 HEIGHT = 128                                            # oled display height
 

pio/neopixel_ring/neopixel_ring.py

@@ -71,7 +71,6 @@ def wheel(pos):
     pos -= 170
     return (pos * 3, 0, 255 - pos * 3)
 
- 
 def rainbow_cycle(wait):
     for j in range(255):
         for i in range(NUM_LEDS):