Fix build for docs

Summary: Pull Request resolved: https://github.com/pytorch/fairseq/pull/372

Differential Revision: D13114426

Pulled By: myleott

fbshipit-source-id: 6c24b96a3556a0ecd3d1f350642a884254a40bd3

fairseq/data/backtranslation_dataset.py

@@ -24,7 +24,7 @@ class BacktranslationDataset(FairseqDataset):
         remove_eos_at_src=False,
         generator_class=sequence_generator.SequenceGenerator,
         cuda=True,
-        **kwargs,
+        **kwargs
     ):
         """
         Sets up a backtranslation dataset which takes a tgt batch, generates

fairseq/data/noising.py

@@ -242,7 +242,7 @@ class NoisingDataset(torch.utils.data.Dataset):
         seed,
         noiser=None,
         noising_class=UnsupervisedMTNoising,
-        **kwargs,
+        **kwargs
     ):
         """
         Sets up a noising dataset which takes a src batch, generates

preprocess.py

@@ -120,7 +120,7 @@ def main(args):
     def file_name(prefix, lang):
         fname = prefix
         if lang is not None:
-            fname += f".{lang}"
+            fname += ".{lang}".format(lang=lang)
         return fname
 
     def dest_path(prefix, lang):

tests/test_noising.py

@@ -146,8 +146,8 @@ class TestDataNoising(unittest.TestCase):
                 x[x_len[i] - 1][i],
                 eos,
                 (
-                    "Expected eos (token id {eos}) at the end of sentence {i} but "
-                    "got {other} instead"
+                    "Expected eos (token id {eos}) at the end of sentence {i} "
+                    "but got {other} instead"
                 ).format(i=i, eos=eos, other=x[i][-1]),
             )