PEP8 cleanup

compressor/base.py

@@ -7,8 +7,8 @@ from django.core.files.base import ContentFile
 from django.template import Context
 from django.template.loader import render_to_string
 from django.utils.encoding import smart_unicode
-from django.utils.safestring import mark_safe
 from django.utils.importlib import import_module
+from django.utils.safestring import mark_safe
 
 from compressor.cache import get_hexdigest, get_mtime