Update Space (evaluate main: dfdd0cc0)

ter.py

@@ -163,12 +163,20 @@ class Ter(evaluate.EvaluationModule):
             citation=_CITATION,
             homepage="http://www.cs.umd.edu/~snover/tercom/",
             inputs_description=_KWARGS_DESCRIPTION,
-            features=datasets.Features(
-                {
-                    "predictions": datasets.Value("string", id="sequence"),
-                    "references": datasets.Sequence(datasets.Value("string", id="sequence"), id="references"),
-                }
-            ),
+            features=[
+                datasets.Features(
+                    {
+                        "predictions": datasets.Value("string", id="sequence"),
+                        "references": datasets.Sequence(datasets.Value("string", id="sequence"), id="references"),
+                    }
+                ),
+                datasets.Features(
+                    {
+                        "predictions": datasets.Value("string", id="sequence"),
+                        "references": datasets.Value("string", id="sequence"),
+                    }
+                ),
+            ],
             codebase_urls=["https://github.com/mjpost/sacreBLEU#ter"],
             reference_urls=[
                 "https://github.com/jhclark/tercom",
@@ -184,6 +192,10 @@ class Ter(evaluate.EvaluationModule):
         support_zh_ja_chars: bool = False,
         case_sensitive: bool = False,
     ):
+        # if only one reference is provided make sure we still use list of lists
+        if isinstance(references[0], str):
+            references = [[ref] for ref in references]
+
         references_per_prediction = len(references[0])
         if any(len(refs) != references_per_prediction for refs in references):
             raise ValueError("Sacrebleu requires the same number of references for each prediction")