add encoding=utf8

Author: Guanheng Zhang

beginner_source/transformer_tutorial.py

@@ -148,7 +148,7 @@ def forward(self, x):
 from torchtext.utils import download_from_url, extract_archive
 from torchtext.data.utils import get_tokenizer
 from torchtext.vocab import build_vocab_from_iterator
-
+# encoding=utf8
 url = 'https://s3.amazonaws.com/research.metamind.io/wikitext/wikitext-2-v1.zip'
 test_filepath, valid_filepath, train_filepath = extract_archive(download_from_url(url))
 tokenizer = get_tokenizer('basic_english')