*: go vet fixes

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

bucket_test.go

@@ -113,6 +113,7 @@ func TestBucket_Get_Capacity(t *testing.T) {
 		// Ensure slice can be appended to without a segfault.
 		k = append(k, []byte("123")...)
 		v = append(v, []byte("123")...)
+		_, _ = k, v // to pass ineffassign
 
 		return nil
 	}); err != nil {

cmd/bolt/main.go

@@ -146,7 +146,7 @@ The commands are:
     buckets     print a list of buckets
     check       verifies integrity of bolt database
     compact     copies a bolt database, compacting it in the process
-    dump        print a hexidecimal dump of a single page
+    dump        print a hexadecimal dump of a single page
     get         print the value of a key in a bucket
     info        print basic info
     keys        print a list of keys in a bucket