Run gofmt -s against codebase (#12943)

model/link_metadata_test.go

@@ -305,8 +305,8 @@ func TestTruncateOpenGraph(t *testing.T) {
 			sampleImage("metoo.gif"),
 			sampleImage("fifth.ico"),
 			sampleImage("notme.tiff")},
-		Audios:  []*opengraph.Audio{&opengraph.Audio{}},
-		Videos:  []*opengraph.Video{&opengraph.Video{}},
+		Audios:  []*opengraph.Audio{{}},
+		Videos:  []*opengraph.Video{{}},
 		Article: &opengraph.Article{},
 		Book:    &opengraph.Book{},
 		Profile: &opengraph.Profile{},