Use asottile/add-trailing-comma
diff --git a/pre_commit_hooks/check_merge_conflict.py b/pre_commit_hooks/check_merge_conflict.py
index 7d87efc..5035b6d 100644
--- a/pre_commit_hooks/check_merge_conflict.py
+++ b/pre_commit_hooks/check_merge_conflict.py
@@ -7,7 +7,7 @@
     b'<<<<<<< ',
     b'======= ',
     b'=======\n',
-    b'>>>>>>> '
+    b'>>>>>>> ',
 ]
 WARNING_MSG = 'Merge conflict string "{0}" found in {1}:{2}'