Fixed whitespace formatting

Author: tekktrik

adafruit_binascii.py

@@ -67,7 +67,7 @@ class Error(Exception):
     # pylint: disable=function-redefined
     def unhexlify(hexstr: Union[str, ReadableBuffer]) -> bytes:
         """Return the binary data represented by hexstr.
-        
+
         :param str|ReadableBuffer hexstr: Hexadecimal string.
         """