diff --git a/spacy/tests/util.py b/spacy/tests/util.py
index 7bc32bf34..6c67d2ee1 100644
--- a/spacy/tests/util.py
+++ b/spacy/tests/util.py
@@ -34,8 +34,17 @@ def get_doc(
         heads = [i + head for i, head in enumerate(heads)]
     if ents is not None:
         ents = [(vocab.strings[ent_type], start, end) for start, end, ent_type in ents]
-    return Doc(vocab, words=words, pos=pos, heads=heads, deps=deps, tags=tags,
-        ents=ents, lemmas=lemmas, morphs=morphs)
+    return Doc(
+        vocab,
+        words=words,
+        pos=pos,
+        heads=heads,
+        deps=deps,
+        tags=tags,
+        ents=ents,
+        lemmas=lemmas,
+        morphs=morphs,
+    )
 
 
 def get_batch(batch_size):
diff --git a/spacy/tokens/doc.pyx b/spacy/tokens/doc.pyx
index de7e0f862..13167c2d4 100644
--- a/spacy/tokens/doc.pyx
+++ b/spacy/tokens/doc.pyx
@@ -1414,6 +1414,7 @@ cdef int set_children_from_heads(TokenC* tokens, int start, int end) except -1:
         if tokens[i].head == 0:
             tokens[tokens[i].l_edge].sent_start = 1
 
+
 cdef int _set_lr_kids_and_edges(TokenC* tokens, int start, int end, int loop_count) except -1:
     # May be called multiple times due to non-projectivity. See issues #3170
     # and #4688.