attempt reformat

IPython/core/tests/simpleerr.py

@@ -8,7 +8,8 b' def div0():'
     x/y
 
 def sysexit(stat, mode):
-    raise SystemExit(stat, f'Mode = {mode}')
+    raise SystemExit(stat, f"Mode = {mode}")
+
 
 def bar(mode):
     "bar"