Fix tests

fairseq/modules/linearized_convolution.py

@@ -5,6 +5,7 @@
 # the root directory of this source tree. An additional grant of patent rights
 # can be found in the PATENTS file in the same directory.
 
+import torch
 import torch.nn.functional as F
 
 from fairseq import utils

fairseq/sequence_generator.py

@@ -6,6 +6,7 @@
 # can be found in the PATENTS file in the same directory.
 
 import math
+
 import torch
 
 from fairseq import utils

fairseq/sequence_scorer.py

@@ -5,6 +5,8 @@
 # the root directory of this source tree. An additional grant of patent rights
 # can be found in the PATENTS file in the same directory.
 
+import torch
+
 from fairseq import utils