whitespace fixup

Author: jbrockmendel

pandas/tests/indexes/datetimes/test_arithmetic.py

@@ -14,7 +14,6 @@
                     date_range)
 
 
-
 class TestDatetimeIndexArithmetic(object):
     tz = [None, 'UTC', 'Asia/Tokyo', 'US/Eastern', 'dateutil/Asia/Singapore',
           'dateutil/US/Pacific']