core: add some blank lines in insertChain

core/blockchain.go

@@ -1796,9 +1796,9 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, er
 			lastCanon = block
 			continue
 		}
+
 		// Retrieve the parent block and it's state to execute on top
 		start := time.Now()
-
 		parent := it.previous()
 		if parent == nil {
 			parent = bc.GetHeader(block.ParentHash(), block.NumberU64()-1)
@@ -1807,6 +1807,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, er
 		if err != nil {
 			return it.index, err
 		}
+
 		// Enable prefetching to pull in trie node paths while processing transactions
 		statedb.StartPrefetcher("chain")
 		activeState = statedb
@@ -1828,6 +1829,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, er
 				}(time.Now(), followup, throwaway, &followupInterrupt)
 			}
 		}
+
 		// Process block using the parent state as reference point
 		substart := time.Now()
 		receipts, logs, usedGas, err := bc.processor.Process(block, statedb, bc.vmConfig)
@@ -1836,6 +1838,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, er
 			atomic.StoreUint32(&followupInterrupt, 1)
 			return it.index, err
 		}
+
 		// Update the metrics touched during block processing
 		accountReadTimer.Update(statedb.AccountReads)                 // Account reads are complete, we can mark them
 		storageReadTimer.Update(statedb.StorageReads)                 // Storage reads are complete, we can mark them
@@ -1911,6 +1914,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, er
 		dirty, _ := bc.stateCache.TrieDB().Size()
 		stats.report(chain, it.index, dirty)
 	}
+
 	// Any blocks remaining here? The only ones we care about are the future ones
 	if block != nil && errors.Is(err, consensus.ErrFutureBlock) {
 		if err := bc.addFutureBlock(block); err != nil {