PEP8 : re-order imports in ticker.py

Author: tacaswell

lib/matplotlib/ticker.py

@@ -146,8 +146,6 @@
                         unicode_literals)
 
 import six
-if six.PY3:
-    long = int
 
 import decimal
 import locale
@@ -157,6 +155,9 @@
 from matplotlib import cbook
 from matplotlib import transforms as mtransforms
 
+if six.PY3:
+    long = int
+
 
 class _DummyAxis(object):
     def __init__(self, minpos=0):