Improve the code

Author: Kubuxu

shell.go

@@ -2,7 +2,6 @@
 package shell
 
 import (
-	"bufio"
 	"bytes"
 	"context"
 	"encoding/json"
@@ -358,9 +357,13 @@ func (s *Shell) FindProvs(ctx context.Context, cid string) (<-chan pstore.PeerIn
 		defer cancel()
 
 		var n notif.QueryEvent
-		scanner := bufio.NewScanner(resp.Output)
-		for scanner.Scan() {
-			json.Unmarshal(scanner.Bytes(), &n)
+		decoder := json.NewDecoder(resp.Output)
+		for {
+			err := decoder.Decode(&n)
+			if err != nil {
+				return
+			}
+
 			if n.Type == notif.Provider {
 				for _, p := range n.Responses {
 					select {