fix import

Author: seemingwang

python/paddle/tensor/__init__.py

@@ -214,6 +214,7 @@
 from .math import angle # noqa: F401
 from .math import fmax # noqa: F401
 from .math import fmin # noqa: F401
+
 from .random import multinomial # noqa: F401
 from .random import standard_normal # noqa: F401
 from .random import normal # noqa: F401