Cleanup a few comments.

accept.go

@@ -23,7 +23,8 @@ func (b *BlockChain) maybeAcceptBlock(block *btcutil.Block) error {
 		return err
 	}
 
-	// The height of this block one more than the referenced previous block.
+	// The height of this block is one more than the referenced previous
+	// block.
 	blockHeight := int64(0)
 	if prevNode != nil {
 		blockHeight = prevNode.height + 1

blocklocator.go

@@ -38,8 +38,8 @@ func (b *BlockChain) BlockLocatorFromHash(hash *btcwire.ShaHash) BlockLocator {
 	}
 
 	// Attempt to find the height of the block that corresponds to the
-	// passed hash, and if it's on a side chain, find the height at which
-	// it forks from the main chain.
+	// passed hash, and if it's on a side chain, also find the height at
+	// which it forks from the main chain.
 	blockHeight := int64(-1)
 	forkHeight := int64(-1)
 	node, exists := b.index[*hash]

chain.go

@@ -758,8 +758,8 @@ func (b *BlockChain) disconnectBlock(node *blockNode, block *btcutil.Block) erro
 	// This node's parent is now the end of the best chain.
 	b.bestChain = node.parent
 
-	// Notify the caller that the block was disconnect from the main chain.
-	// The caller would typically want to react with actions such as
+	// Notify the caller that the block was disconnected from the main
+	// chain.  The caller would typically want to react with actions such as
 	// updating wallets.
 	b.sendNotification(NTBlockDisconnected, block)
 
@@ -789,7 +789,7 @@ func (b *BlockChain) reorganizeChain(detachNodes, attachNodes *list.List) error
 	//
 	// NOTE: bitcoind does these checks directly when it connects a block.
 	// The downside to that approach is that if any of these checks fail
-	// after disconneting some blocks or attaching others, all of the
+	// after disconnecting some blocks or attaching others, all of the
 	// operations have to be rolled back to get the chain back into the
 	// state it was before the rule violation (or other failure).  There are
 	// at least a couple of ways accomplish that rollback, but both involve

validate.go

@@ -790,7 +790,7 @@ func (b *BlockChain) checkConnectBlock(node *blockNode, block *btcutil.Block) er
 		}
 
 		// Check for overflow or going over the limits.  We have to do
-		// this on every loop to avoid overflow.
+		// this on every loop iteration to avoid overflow.
 		lastSigops := totalSigOps
 		totalSigOps += numsigOps
 		if totalSigOps < lastSigops || totalSigOps > maxSigOpsPerBlock {