archive/zip, crypto/tls, net/http: Fix print format errors.

All of the errors were located using "go vet ./..." in "src/pkg".

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/6856056

src/pkg/archive/zip/zip_test.go

@@ -186,12 +186,12 @@ func testInvalidHeader(h *FileHeader, t *testing.T) {
 		t.Fatalf("error writing content: %v", err)
 	}
 	if err := z.Close(); err != nil {
-		t.Fatal("error closing zip writer: %v", err)
+		t.Fatalf("error closing zip writer: %v", err)
 	}
 
 	b := buf.Bytes()
 	if _, err = NewReader(bytes.NewReader(b), int64(len(b))); err != ErrFormat {
-		t.Fatal("got %v, expected ErrFormat", err)
+		t.Fatalf("got %v, expected ErrFormat", err)
 	}
 }
 

src/pkg/crypto/tls/prf_test.go

@@ -51,7 +51,7 @@ func TestKeysFromPreMasterSecret(t *testing.T) {
 
 		masterSecret := masterFromPreMasterSecret(test.version, in, clientRandom, serverRandom)
 		if s := hex.EncodeToString(masterSecret); s != test.masterSecret {
-			t.Errorf("#%d: bad master secret %s, want %s", s, test.masterSecret)
+			t.Errorf("#%d: bad master secret %s, want %s", i, s, test.masterSecret)
 			continue
 		}
 

src/pkg/net/http/transfer_test.go

@@ -20,13 +20,13 @@ func TestBodyReadBadTrailer(t *testing.T) {
 	n, err := b.Read(buf[:3])
 	got := string(buf[:n])
 	if got != "foo" || err != nil {
-		t.Fatalf(`first Read = %n (%q), %v; want 3 ("foo")`, n, got, err)
+		t.Fatalf(`first Read = %d (%q), %v; want 3 ("foo")`, n, got, err)
 	}
 
 	n, err = b.Read(buf[:])
 	got = string(buf[:n])
 	if got != "bar" || err != nil {
-		t.Fatalf(`second Read = %n (%q), %v; want 3 ("bar")`, n, got, err)
+		t.Fatalf(`second Read = %d (%q), %v; want 3 ("bar")`, n, got, err)
 	}
 
 	n, err = b.Read(buf[:])