fix trailing whitespace

Author: dhalbert

ports/raspberrypi/common-hal/busio/I2C.c

@@ -50,10 +50,10 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
 
     // Don't bother to check for pull-ups when the internal pull-ups are used.
     #if CIRCUITPY_REQUIRE_I2C_PULLUPS && !CIRCUITPY_I2C_ALLOW_INTERNAL_PULL_UP
-    
+
     // TODO: maybe check the pull-up efficacy with timing scaled by frequency
     // as is done in espressif, instead of using a fixed 3us.
-    
+
     // Test that the pins are in a high state. (Hopefully indicating they are pulled up.)
     gpio_set_function(sda->number, GPIO_FUNC_SIO);
     gpio_set_function(scl->number, GPIO_FUNC_SIO);