fmt: []T handled like []byte for 'type T byte'

[rsc]

http://play.golang.org/p/gii_KLkBJF

package main

import "fmt"

type Tuint8 uint8

func (t Tuint8) String() string { return "Tuint8" }

type Tint8 int8

func (t Tint8) String() string { return "Tint8" }

func main() {
    fmt.Println("[]Tint8:", []Tint8{1,2,3})
    fmt.Println("[]Tuint8:", []Tuint8{1,2,3})
    fmt.Println("[]byte:", []byte{1,2,3})
}

should probably print

[]Tint8: [Tint8 Tint8 Tint8]
[]Tuint8: [Tuint8 Tuint8 Tuint8]
[]byte: [1 2 3]

but prints

[]Tint8: [Tint8 Tint8 Tint8]
[]Tuint8: [1 2 3]
[]byte: [1 2 3]

The check for []byte should only apply to []byte (and the indistinguishable []uint8) but
not to [] of a typed byte.

[rsc]

Comment 1:

Labels changed: added repo-main.

[gopherbot]

Comment 2:

CL https://golang.org/cl/129330043 mentions this issue.

[adg]

Comment 3:

This issue was closed by revision 326f48e.

Status changed to Fixed.