add multiline redactor test

pkg/collect/collector_test.go

@@ -202,6 +202,41 @@ another line here`,
 			want: map[string]string{
 				"data/datacollectorname": `abc 123
 another line here
+`,
+			},
+		},
+		{
+			name: "custom multiline redactor",
+			Collect: &troubleshootv1beta1.Collect{
+				Data: &troubleshootv1beta1.Data{
+					CollectorMeta: troubleshootv1beta1.CollectorMeta{
+						CollectorName: "datacollectorname",
+						Exclude:       multitype.BoolOrString{},
+					},
+					Name: "data",
+					Data: `xyz123
+abc
+xyz123
+xyz123
+abc`,
+				},
+			},
+			Redactors: []*troubleshootv1beta1.Redact{
+				{
+					MultiLine: []troubleshootv1beta1.MultiLine{
+						{
+							Selector: "abc",
+							Redactor: "xyz(123)",
+						},
+					},
+				},
+			},
+			want: map[string]string{
+				"data/datacollectorname": `xyz123
+abc
+123
+xyz123
+abc
 `,
 			},
 		},