Fix lint

core/chain_makers.go

@@ -271,7 +271,7 @@ func (cr *fakeChainReader) GetHeader(hash common.Hash, number uint64) *block.Hea
 func (cr *fakeChainReader) GetBlock(hash common.Hash, number uint64) *types.Block   { return nil }
 func (cr *fakeChainReader) ReadShardState(epoch *big.Int) (*shard.State, error)     { return nil, nil }
 func (cr *fakeChainReader) ReadActiveValidatorList() ([]common.Address, error)      { return nil, nil }
-func (cr *fakeChainReader) ReadValidatorList() ([]common.Address, error)      { return nil, nil }
+func (cr *fakeChainReader) ReadValidatorList() ([]common.Address, error)            { return nil, nil }
 func (cr *fakeChainReader) ValidatorCandidates() []common.Address                   { return nil }
 func (cr *fakeChainReader) ReadValidatorInformation(addr common.Address) (*staking.ValidatorWrapper, error) {
 	return nil, nil