Fix merge conflict

Author: humitos

readthedocs/rtd_tests/tests/test_doc_serving.py

@@ -12,7 +12,8 @@
 
 from readthedocs.core.views.serve import _serve_symlink_docs
 from readthedocs.builds.constants import STABLE
-from readthedocs.builds.models import Versionfrom readthedocs.projects import constants
+from readthedocs.builds.models import Version
+from readthedocs.projects import constants
 from readthedocs.projects.models import Project
 from readthedocs.rtd_tests.base import RequestFactoryTestMixin