Fix dict proxy copy

honnibal · honnibal · commit 351ce600c5e0 · 2021-01-25T01:21:47.000+11:00
diff --git a/spacy/tokens/_dict_proxies.py b/spacy/tokens/_dict_proxies.py
@@ -34,7 +34,7 @@ def _make_span_group(self, name: str, spans: Iterable["Span"]) -> SpanGroup:
         return SpanGroup(self.doc_ref(), name=name, spans=spans)
 
     def copy(self) -> "SpanGroups":
-        return SpanGroup(self.doc_ref()).from_bytes(self.to_bytes())
+        return SpanGroups(self.doc_ref()).from_bytes(self.to_bytes())
 
     def to_bytes(self) -> bytes:
         # We don't need to serialize this as a dict, because the groups
