fix(plugin): Add missing -n known flag

Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
(cherry picked from commit 6473234f43)

cmd/helm/load_plugins.go

@@ -127,7 +127,7 @@ func loadPlugins(baseCmd *cobra.Command, out io.Writer) {
 func manuallyProcessArgs(args []string) ([]string, []string) {
 	known := []string{}
 	unknown := []string{}
-	kvargs := []string{"--kube-context", "--namespace", "--kubeconfig", "--registry-config", "--repository-cache", "--repository-config"}
+	kvargs := []string{"--kube-context", "--namespace", "-n", "--kubeconfig", "--registry-config", "--repository-cache", "--repository-config"}
 	knownArg := func(a string) bool {
 		for _, pre := range kvargs {
 			if strings.HasPrefix(a, pre+"=") {

cmd/helm/plugin_test.go

@@ -30,14 +30,27 @@ func TestManuallyProcessArgs(t *testing.T) {
 		"--debug",
 		"--foo", "bar",
 		"--kubeconfig=/home/foo",
+		"--kubeconfig", "/home/foo",
+		"--kube-context=test1",
 		"--kube-context", "test1",
+		"-n=test2",
 		"-n", "test2",
+		"--namespace=test2",
+		"--namespace", "test2",
 		"--home=/tmp",
 		"command",
 	}
 
 	expectKnown := []string{
-		"--debug", "--kubeconfig=/home/foo", "--kube-context", "test1", "-n", "test2",
+		"--debug",
+		"--kubeconfig=/home/foo",
+		"--kubeconfig", "/home/foo",
+		"--kube-context=test1",
+		"--kube-context", "test1",
+		"-n=test2",
+		"-n", "test2",
+		"--namespace=test2",
+		"--namespace", "test2",
 	}
 
 	expectUnknown := []string{