Added final newline

Author: Melissa LeBlanc-Williams

adafruit_ht16k33/segments.py

@@ -309,4 +309,4 @@ def __setitem__(self, key, value):
     def __getitem__(self, key):
         if key > self._num_of_colons - 1:
             raise ValueError("Trying to access a non-existent colon.")
-        return bool(self._disp._get_buffer(0x04) & self.MASKS[key])
+        return bool(self._disp._get_buffer(0x04) & self.MASKS[key])