diff --git a/lldb/examples/synthetic/libcxx.py b/lldb/examples/synthetic/libcxx.py
index 060ff9010084974..b078a4eb2f63946 100644
--- a/lldb/examples/synthetic/libcxx.py
+++ b/lldb/examples/synthetic/libcxx.py
@@ -764,7 +764,9 @@ def update(self):
                     map_.GetChildMemberWithName("__end_cap_")
                 )
             else:
-                map_endcap = map_.GetChildMemberWithName("__end_cap_").GetValueAsUnsigned(0)
+                map_endcap = map_.GetChildMemberWithName(
+                    "__end_cap_"
+                ).GetValueAsUnsigned(0)
 
             # check consistency
             if not map_first <= map_begin <= map_end <= map_endcap: