*: format 'for range' statement

    replace 'for _ = range' statement with 'for range'

Author: spinlock

pkg/proxy/backend.go

@@ -474,7 +474,7 @@ func (s *sharedBackendConn) BackendConn(database int32, seed uint, must bool) *B
 	var parallel = s.conns[database]
 
 	var i = seed
-	for _ = range parallel {
+	for range parallel {
 		i = (i + 1) % uint(len(parallel))
 		if bc := parallel[i]; bc.IsConnected() {
 			return bc

pkg/proxy/forward.go

@@ -218,7 +218,7 @@ func (d *forwardHelper) forward2(s *Slot, r *Request) *BackendConn {
 	if s.migrate.bc == nil && !r.IsMasterOnly() && len(s.replicaGroups) != 0 {
 		for _, group := range s.replicaGroups {
 			var i = seed
-			for _ = range group {
+			for range group {
 				i = (i + 1) % uint(len(group))
 				if bc := group[i].BackendConn(database, seed, false); bc != nil {
 					return bc

pkg/proxy/proxy.go

@@ -348,7 +348,7 @@ func (s *Proxy) rewatchSentinels(servers []string) {
 				}
 			}()
 			go func() {
-				for _ = range trigger {
+				for range trigger {
 					var success int
 					for i := 0; i != 10 && !p.IsCanceled() && success != 2; i++ {
 						timeout := time.Second * 5

pkg/topom/topom_sentinel.go

@@ -147,7 +147,7 @@ func (s *Topom) rewatchSentinels(servers []string) {
 				}
 			}()
 			go func() {
-				for _ = range trigger {
+				for range trigger {
 					var success int
 					for i := 0; i != 10 && !p.IsCanceled() && success != 2; i++ {
 						timeout := time.Second * 5

pkg/utils/redis/sentinel.go

@@ -511,7 +511,7 @@ func (s *Sentinel) MonitorGroups(sentinels []string, timeout time.Duration, conf
 	}
 
 	var last error
-	for _ = range sentinels {
+	for range sentinels {
 		select {
 		case <-cntx.Done():
 			if last != nil {
@@ -576,7 +576,7 @@ func (s *Sentinel) RemoveGroups(sentinels []string, timeout time.Duration, group
 	}
 
 	var last error
-	for _ = range sentinels {
+	for range sentinels {
 		select {
 		case <-cntx.Done():
 			if last != nil {
@@ -633,7 +633,7 @@ func (s *Sentinel) RemoveGroupsAll(sentinels []string, timeout time.Duration) er
 	}
 
 	var last error
-	for _ = range sentinels {
+	for range sentinels {
 		select {
 		case <-cntx.Done():
 			if last != nil {