Update for new version of black

python/lsst/ctrl/mpexec/cmdLineFwk.py

@@ -251,7 +251,7 @@ def _checkOutputInputConsistency(self) -> str | None:
             # contiguous subsequence of outputs (normally they're also at the
             # end, but --rebase will in general put them in the middle).
             for n in reversed(range(1 + len(self.output.chain) - len(self.inputs))):
-                if self.inputs == self.output.chain[n:n + len(self.inputs)]:
+                if self.inputs == self.output.chain[n : n + len(self.inputs)]:
                     return None
             return (
                 f"Output CHAINED collection {self.output.name!r} exists and does not include the "