client-go: refactor: Fix styling issues (#107248)

* client-go: Remove unreachable return

Due to the way the switch statement is done,
the return at the end of the function will neverbe reached.

Signed-off-by: Ismayil Mirzali <ismayilmirzeli@gmail.com>

* client-go: Refactor for clarity

Fixed one instance where the error message should be lowercase.
Made the fields in the struct literal more explicit

Signed-off-by: Ismayil Mirzali <ismayilmirzeli@gmail.com>

staging/src/k8s.io/client-go/tools/cache/reflector.go

@@ -231,7 +231,7 @@ var (
 
 	// Used to indicate that watching stopped because of a signal from the stop
 	// channel passed in from a client of the reflector.
-	errorStopRequested = errors.New("Stop requested")
+	errorStopRequested = errors.New("stop requested")
 )
 
 // resyncChan returns a channel which will receive something when a resync is
@@ -258,7 +258,7 @@ func (r *Reflector) ListAndWatch(stopCh <-chan struct{}) error {
 	options := metav1.ListOptions{ResourceVersion: r.relistResourceVersion()}
 
 	if err := func() error {
-		initTrace := trace.New("Reflector ListAndWatch", trace.Field{"name", r.name})
+		initTrace := trace.New("Reflector ListAndWatch", trace.Field{Key: "name", Value: r.name})
 		defer initTrace.LogIfLong(10 * time.Second)
 		var list runtime.Object
 		var paginatedResult bool
@@ -319,7 +319,7 @@ func (r *Reflector) ListAndWatch(stopCh <-chan struct{}) error {
 			panic(r)
 		case <-listCh:
 		}
-		initTrace.Step("Objects listed", trace.Field{"error", err})
+		initTrace.Step("Objects listed", trace.Field{Key: "error", Value: err})
 		if err != nil {
 			klog.Warningf("%s: failed to list %v: %v", r.name, r.expectedTypeName, err)
 			return fmt.Errorf("failed to list %v: %v", r.expectedTypeName, err)

staging/src/k8s.io/client-go/tools/cache/reflector_test.go

@@ -813,7 +813,6 @@ func TestReflectorFullListIfExpired(t *testing.T) {
 				t.Error(err)
 				return nil, err
 			}
-			return nil, nil
 		},
 	}
 	r := NewReflector(lw, &v1.Pod{}, s, 0)