golangci: enable/fix misspell

.golangci.yml

@@ -46,6 +46,7 @@ linters:
     - contextcheck
     - errorlint
     - gofmt
+    - misspell
     - whitespace
     - goimports
   disable-all: true

pkg/core/blockchain_core_test.go

@@ -77,7 +77,7 @@ func TestAddBlock(t *testing.T) {
 }
 
 func TestRemoveOldTransfers(t *testing.T) {
-	// Creating proper number of transfers/blocks takes unneccessary time, so emulate
+	// Creating proper number of transfers/blocks takes unnecessary time, so emulate
 	// some DB with stale entries.
 	bc := newTestChain(t)
 	h, err := bc.GetHeader(bc.GetHeaderHash(0))

pkg/core/mpt/billet.go

@@ -37,7 +37,7 @@ type Billet struct {
 
 // NewBillet returns a new billet for MPT trie restoring. It accepts a MemCachedStore
 // to decouple storage errors from logic errors so that all storage errors are
-// processed during `store.Persist()` at the caller. Another benifit is
+// processed during `store.Persist()` at the caller. Another benefit is
 // that every `Put` can be considered an atomic operation.
 func NewBillet(rootHash util.Uint256, mode TrieMode, prefix storage.KeyPrefix, store *storage.MemCachedStore) *Billet {
 	return &Billet{