gofmt: apply gofmt -w src misc

Remove trailing whitespace in comments.
No other changes.

R=r
CC=golang-dev
https://golang.org/cl/6815053

src/pkg/testing/testing.go

@@ -14,7 +14,7 @@
 //     func BenchmarkXxx(*testing.B)
 // are considered benchmarks, and are executed by the "go test" command when
 // the -test.bench flag is provided. Benchmarks are run sequentially.
-// 
+//
 // For a description of the testing flags, see
 // http://golang.org/cmd/go/#Description_of_testing_flags.
 //
@@ -267,7 +267,7 @@ func (c *common) Fatalf(format string, args ...interface{}) {
 	c.FailNow()
 }
 
-// Parallel signals that this test is to be run in parallel with (and only with) 
+// Parallel signals that this test is to be run in parallel with (and only with)
 // other parallel tests in this CPU group.
 func (t *T) Parallel() {
 	t.signal <- (*T)(nil) // Release main testing loop
@@ -285,7 +285,7 @@ func tRunner(t *T, test *InternalTest) {
 	t.start = time.Now()
 
 	// When this goroutine is done, either because test.F(t)
-	// returned normally or because a test failure triggered 
+	// returned normally or because a test failure triggered
 	// a call to runtime.Goexit, record the duration and send
 	// a signal saying that the test is done.
 	defer func() {