fixed some more

Author: SmithSamuelM

src/keri/core/coring.py

@@ -3408,7 +3408,7 @@ def _derive(clas, sad: dict, *,
 
         """
         if code not in DigDex:
-            raise ValueError(f"Unsupported digest {code = }.")
+            raise ValueError(f"Unsupported digest {code=}.")
 
         sad = dict(sad)  # make shallow copy so don't clobber original sad
         # fill id field denoted by label with dummy chars to get size correct