message: Add missing negation: filter slashed validators.
diff: @@ -628,7 +628,7 @@ where
  .iter_bonded()
  .flat_map(|e_id| self.era(e_id).consensus.validators_with_evidence())
  .unique()
  - .filter(|pub_key| self.era(era_id).slashed.contains(pub_key))
  + .filter(|pub_key| !self.era(era_id).slashed.contains(pub_key))
  .cloned()
  .collect();
  let candidate_block = CandidateBlock::new(proto_block, accusations);
  