diff --git a/prymer/offtarget/bwa.py b/prymer/offtarget/bwa.py
index d49bd9a..1dca196 100644
--- a/prymer/offtarget/bwa.py
+++ b/prymer/offtarget/bwa.py
@@ -34,6 +34,7 @@
 [BwaResult(query=Query(id='NA', bases='AAAAAA'), hit_count=3968, hits=[])]
 >>> bwa.close()
 True
+
 ```
 """  # noqa: E501