core: fix comment typo

core/blockchain.go

@@ -113,7 +113,7 @@ type BlockChain struct {
 }
 
 // NewBlockChain returns a fully initialised block chain using information
-// available in the database. It initialiser the default Ethereum Validator and
+// available in the database. It initialises the default Ethereum Validator and
 // Processor.
 func NewBlockChain(chainDb ethdb.Database, config *params.ChainConfig, engine consensus.Engine, mux *event.TypeMux, vmConfig vm.Config) (*BlockChain, error) {
 	bodyCache, _ := lru.New(bodyCacheLimit)