chore: import upstream snapshot with attribution

decoding/GAD/fairseq/data/encoders/space_tokenizer.py

@@ -0,0 +1,21 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+import re
+
+from fairseq.data.encoders import register_tokenizer
+from fairseq.dataclass import FairseqDataclass
+
+
+@register_tokenizer("space", dataclass=FairseqDataclass)
+class SpaceTokenizer(object):
+    def __init__(self, *unused):
+        self.space_tok = re.compile(r"\s+")
+
+    def encode(self, x: str) -> str:
+        return self.space_tok.sub(" ", x)
+
+    def decode(self, x: str) -> str:
+        return x