cleaned up and updated comments and editor class name

Assets/Scenes/ImageTracking/ImageTrackingWithMultiplePrefabs/PrefabImagePairManager.cs

 {
     /// <summary>
     /// This component listens for images detected by the <c>XRImageTrackingSubsystem</c>
-    /// and overlays some information as well as the source Texture2D on top of the
-    /// detected image.
+    /// and overlays some prefabs on top of the detected image.
     /// </summary>
     [RequireComponent(typeof(ARTrackedImageManager))]
     public class PrefabImagePairManager : MonoBehaviour, ISerializationCallbackReceiver
         }
 
 #if UNITY_EDITOR
-
+        /// <summary>
+        /// This customizes the inspector component and updates the prefab list when
+        /// the reference image library is changed.
+        /// </summary>
-        class MultiTrackedImageInfoManagerInspector : Editor 
+        class PrefabImagePairManagerInspector : Editor
         {
             List<XRReferenceImage> m_ReferenceImages = new List<XRReferenceImage>();
             bool m_IsExpanded = true;
 
                 return false;
             }
-            
-            public override void OnInspectorGUI () 
+
+            public override void OnInspectorGUI()
             {
                 //customized inspector
                 var behaviour = serializedObject.targetObject as PrefabImagePairManager;
                 {
                     EditorGUILayout.PropertyField(serializedObject.FindProperty("m_Script"));
                 }
-                
+
                 var libraryProperty = serializedObject.FindProperty(nameof(m_ImageLibrary));
                 EditorGUILayout.PropertyField(libraryProperty);
                 var library = libraryProperty.objectReferenceValue as XRReferenceImageLibrary;
                         }
                         behaviour.m_PrefabsDictionary = tempDictionary;
                     }
-                }   
+                }
 
                 // update current
                 m_ReferenceImages.Clear();
                     using (new EditorGUI.IndentLevelScope())
                     {
                         EditorGUI.BeginChangeCheck();
-                    
+
-                            var prefab = (GameObject)EditorGUILayout.ObjectField(image.name, behaviour.m_PrefabsDictionary[image.guid], typeof(GameObject), false);
+                            var prefab = (GameObject) EditorGUILayout.ObjectField(image.name, behaviour.m_PrefabsDictionary[image.guid], typeof(GameObject), false);
+
                         if (EditorGUI.EndChangeCheck())
                         {
                             Undo.RecordObject(target, "Update Prefab");
-                    }   
+                    }
-	        }
+            }
         }
 #endif
     }

Assets/Scenes/ImageTracking/Prefabs/FlowerPrefab/Shaders/Vegetation.shader

 
         // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
         // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
-        // #pragma instancing_options assumeuniformscaling
         UNITY_INSTANCING_BUFFER_START(Props)
         // put more per-instance properties here
         UNITY_INSTANCING_BUFFER_END(Props)

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