fix whitespace for pylint

Author: jerryneedell

adafruit_tsl2561.py

@@ -156,7 +156,7 @@ def _compute_lux(self):
             lux = 0.0128 * ch0 - 0.0153 * ch1
         elif ratio <= 1.30:
             lux = 0.00146 * ch0 - 0.00112 * ch1
-        else :
+        else:
             lux = 0
         # Pretty sure the floating point math formula on pg. 23 of datasheet
         # is based on 16x gain and 402ms integration time. Need to scale