#1597: Fix docs for enabling plugins

Author: owen-m1

plugins/MultiDrag/README.md

@@ -24,7 +24,7 @@ Sortable.mount(new MultiDrag());
 
 ```js
 new Sortable(el, {
-	multiDrag: false, // Enable the plugin
+	multiDrag: true, // Enable the plugin
 	selectedClass: "sortable-selected", // Class name for selected item
 	multiDragKey: null, // Key that must be down for items to be selected
 

plugins/OnSpill/README.md

@@ -28,7 +28,7 @@ This plugin, when enabled, will cause the dragged item to be reverted to it's or
 
 ```js
 new Sortable(el, {
-	revertOnSpill: false, // Enable plugin
+	revertOnSpill: true, // Enable plugin
 	// Called when item is spilled
 	onSpill: function(/**Event*/evt) {
 		evt.item // The spilled item
@@ -51,7 +51,7 @@ This plugin, when enabled, will cause the dragged item to be removed from the DO
 
 ```js
 new Sortable(el, {
-	removeOnSpill: false, // Enable plugin
+	removeOnSpill: true, // Enable plugin
 	// Called when item is spilled
 	onSpill: function(/**Event*/evt) {
 		evt.item // The spilled item

plugins/Swap/README.md

@@ -22,7 +22,7 @@ Sortable.mount(new Swap());
 
 ```js
 new Sortable(el, {
-	swap: false, // Enable swap mode
+	swap: true, // Enable swap mode
 	swapClass: "sortable-swap-highlight" // Class name for swap item (if swap mode is enabled)
 });
 ```