src, misc: applied gofmt -s -w

Pending CL 113120043.

LGTM=dave
R=golang-codereviews, dave
CC=golang-codereviews
https://golang.org/cl/112290043

src/cmd/cgo/out.go

@@ -1016,7 +1016,7 @@ func forFieldList(fl *ast.FieldList, fn func(int, ast.Expr)) {
 			fn(i, r.Type)
 			i++
 		} else {
-			for _ = range r.Names {
+			for range r.Names {
 				fn(i, r.Type)
 				i++
 			}

src/pkg/bufio/bufio_test.go

@@ -438,7 +438,7 @@ func TestUnreadRuneError(t *testing.T) {
 	if err != nil {
 		t.Error("unexpected error on ReadRune (2):", err)
 	}
-	for _ = range buf {
+	for range buf {
 		_, err = r.ReadByte()
 		if err != nil {
 			t.Error("unexpected error on ReadByte (2):", err)

src/pkg/database/sql/sql.go

@@ -580,7 +580,7 @@ func (db *DB) maybeOpenNewConnections() {
 
 // Runs in a separate goroutine, opens new connections when requested.
 func (db *DB) connectionOpener() {
-	for _ = range db.openerCh {
+	for range db.openerCh {
 		db.openNewConnection()
 	}
 }

src/pkg/database/sql/sql_test.go

@@ -1708,7 +1708,7 @@ func doConcurrentTest(t testing.TB, ct concurrentTest) {
 
 	for i := 0; i < maxProcs*2; i++ {
 		go func() {
-			for _ = range reqs {
+			for range reqs {
 				err := ct.test(t)
 				if err != nil {
 					wg.Done()
@@ -1750,7 +1750,7 @@ func manyConcurrentQueries(t testing.TB) {
 
 	for i := 0; i < maxProcs*2; i++ {
 		go func() {
-			for _ = range reqs {
+			for range reqs {
 				rows, err := stmt.Query()
 				if err != nil {
 					t.Errorf("error on query:  %v", err)

src/pkg/go/printer/printer_test.go

@@ -357,7 +357,7 @@ func idents(f *ast.File) <-chan *ast.Ident {
 // identCount returns the number of identifiers found in f.
 func identCount(f *ast.File) int {
 	n := 0
-	for _ = range idents(f) {
+	for range idents(f) {
 		n++
 	}
 	return n

src/pkg/log/syslog/syslog_test.go

@@ -314,7 +314,7 @@ func TestConcurrentReconnect(t *testing.T) {
 	count := make(chan int)
 	go func() {
 		ct := 0
-		for _ = range done {
+		for range done {
 			ct++
 			// we are looking for 500 out of 1000 events
 			// here because lots of log messages are lost

src/pkg/net/dial_test.go

@@ -488,7 +488,7 @@ func TestDialDualStackLocalhost(t *testing.T) {
 	}
 
 	d := &Dialer{DualStack: true}
-	for _ = range dss.lns {
+	for range dss.lns {
 		if c, err := d.Dial("tcp", "localhost:"+dss.port); err != nil {
 			t.Errorf("Dial failed: %v", err)
 		} else {

src/pkg/os/exec/exec.go

@@ -358,7 +358,7 @@ func (c *Cmd) Wait() error {
 	c.ProcessState = state
 
 	var copyError error
-	for _ = range c.goroutine {
+	for range c.goroutine {
 		if err := <-c.errch; err != nil && copyError == nil {
 			copyError = err
 		}

src/pkg/runtime/malloc_test.go

@@ -100,7 +100,7 @@ func BenchmarkGoroutineBlocking(b *testing.B) {
 
 func BenchmarkGoroutineForRange(b *testing.B) {
 	read := func(ch chan struct{}) {
-		for _ = range ch {
+		for range ch {
 		}
 	}
 	benchHelper(b, *n, read)

src/pkg/runtime/map_test.go

@@ -253,7 +253,7 @@ func testConcurrentReadsAfterGrowth(t *testing.T, useReflect bool) {
 			for nr := 0; nr < numReader; nr++ {
 				go func() {
 					defer wg.Done()
-					for _ = range m {
+					for range m {
 					}
 				}()
 				go func() {

src/pkg/runtime/mapspeed_test.go

@@ -241,7 +241,7 @@ func BenchmarkMapIter(b *testing.B) {
 	}
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		for _ = range m {
+		for range m {
 		}
 	}
 }
@@ -250,7 +250,7 @@ func BenchmarkMapIterEmpty(b *testing.B) {
 	m := make(map[int]bool)
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		for _ = range m {
+		for range m {
 		}
 	}
 }

src/pkg/runtime/race/testdata/chan_test.go

@@ -88,7 +88,7 @@ func TestNoRaceChanAsyncCloseRecv3(t *testing.T) {
 		v = 1
 		close(c)
 	}()
-	for _ = range c {
+	for range c {
 	}
 	v = 2
 }
@@ -127,7 +127,7 @@ func TestNoRaceChanSyncCloseRecv3(t *testing.T) {
 		v = 1
 		close(c)
 	}()
-	for _ = range c {
+	for range c {
 	}
 	v = 2
 }

src/pkg/runtime/race/testdata/map_test.go

@@ -57,7 +57,7 @@ func TestRaceMapRange(t *testing.T) {
 	m := make(map[int]int)
 	ch := make(chan bool, 1)
 	go func() {
-		for _ = range m {
+		for range m {
 		}
 		ch <- true
 	}()
@@ -69,7 +69,7 @@ func TestRaceMapRange2(t *testing.T) {
 	m := make(map[int]int)
 	ch := make(chan bool, 1)
 	go func() {
-		for _ = range m {
+		for range m {
 		}
 		ch <- true
 	}()
@@ -85,11 +85,11 @@ func TestNoRaceMapRangeRange(t *testing.T) {
 	m[0] = 0
 	ch := make(chan bool, 1)
 	go func() {
-		for _ = range m {
+		for range m {
 		}
 		ch <- true
 	}()
-	for _ = range m {
+	for range m {
 	}
 	<-ch
 }

src/pkg/runtime/race/testdata/slice_test.go

@@ -198,7 +198,7 @@ func TestNoRaceStructSlicesRangeWrite(t *testing.T) {
 	s.a = make([]int, 10)
 	s.b = make([]int, 10)
 	go func() {
-		for _ = range s.a {
+		for range s.a {
 		}
 		ch <- true
 	}()
@@ -240,7 +240,7 @@ func TestNoRaceSliceRangeWrite(t *testing.T) {
 		s[3] = 3
 		c <- true
 	}()
-	for _ = range s {
+	for range s {
 	}
 	<-c
 }
@@ -252,7 +252,7 @@ func TestRaceSliceRangeAppend(t *testing.T) {
 		s = append(s, 3)
 		c <- true
 	}()
-	for _ = range s {
+	for range s {
 	}
 	<-c
 }
@@ -264,7 +264,7 @@ func TestNoRaceSliceRangeAppend(t *testing.T) {
 		_ = append(s, 3)
 		c <- true
 	}()
-	for _ = range s {
+	for range s {
 	}
 	<-c
 }
@@ -295,7 +295,7 @@ func TestRaceSliceVarRange(t *testing.T) {
 	c := make(chan bool, 1)
 	s := make([]int, 10)
 	go func() {
-		for _ = range s {
+		for range s {
 		}
 		c <- true
 	}()

src/pkg/runtime/string_test.go

@@ -85,7 +85,7 @@ func BenchmarkRuneIterate(b *testing.B) {
 	}
 	s := string(bytes)
 	for i := 0; i < b.N; i++ {
-		for _ = range s {
+		for range s {
 		}
 	}
 }
@@ -97,7 +97,7 @@ func BenchmarkRuneIterate2(b *testing.B) {
 	}
 	s := string(bytes)
 	for i := 0; i < b.N; i++ {
-		for _ = range s {
+		for range s {
 		}
 	}
 }

src/pkg/unicode/utf8/utf8.go

@@ -372,7 +372,7 @@ func RuneCount(p []byte) int {
 
 // RuneCountInString is like RuneCount but its input is a string.
 func RuneCountInString(s string) (n int) {
-	for _ = range s {
+	for range s {
 		n++
 	}
 	return