follow to golang-lint 1.40

Signed-off-by: monkey <golang@88.com>

error.go

@@ -10,6 +10,7 @@ import (
 	"github.com/go-redis/redis/v8/internal/proto"
 )
 
+// ErrClosed performs any operation on the closed client will return this error.
 var ErrClosed = pool.ErrClosed
 
 type Error interface {

internal/hashtag/hashtag.go

@@ -60,7 +60,7 @@ func RandomSlot() int {
 	return rand.Intn(slotNumber)
 }
 
-// hashSlot returns a consistent slot number between 0 and 16383
+// Slot returns a consistent slot number between 0 and 16383
 // for any given string key.
 func Slot(key string) int {
 	if key == "" {

internal/log.go

@@ -19,6 +19,8 @@ func (l *logger) Printf(ctx context.Context, format string, v ...interface{}) {
 	_ = l.log.Output(2, fmt.Sprintf(format, v...))
 }
 
+// Logger calls Output to print to the stderr.
+// Arguments are handled in the manner of fmt.Print.
 var Logger Logging = &logger{
 	log: log.New(os.Stderr, "redis: ", log.LstdFlags|log.Lshortfile),
 }

internal/pool/pool.go

@@ -12,7 +12,10 @@ import (
 )
 
 var (
+	// ErrClosed performs any operation on the closed client will return this error.
 	ErrClosed = errors.New("redis: client is closed")
+
+	// ErrPoolTimeout timed out waiting to get a connection from the connection pool.
 	ErrPoolTimeout = errors.New("redis: connection pool timeout")
 )
 

internal/proto/reader.go

@@ -8,6 +8,7 @@ import (
 	"github.com/go-redis/redis/v8/internal/util"
 )
 
+// redis resp protocol data type.
 const (
 	ErrorReply  = '-'
 	StatusReply = '+'