clean up tabs in readme

Author: samjacobclift

README.md

@@ -7,7 +7,7 @@ Angular 1 module that integrates with Sortable.js
 
 ## Install with NPM
 
-	npm install angular-legacy-sortablejs-maintained
+  npm install angular-legacy-sortablejs-maintained
 
 Don't install the old angular-legacy-sortablejs package as thats not maintained
 
@@ -17,59 +17,64 @@ Don't install the old angular-legacy-sortablejs package as thats not maintained
 
 ```js
 angular.module('exampleApp', ['ng-sortable'])
-	.component('dragAndDropExample', {
-		template: `<ul ng-sortable>
-				<li ng-repeat="item in ['burgers', 'chips', 'hotdog']">
-					{$ item $}
-				</li>
-			</ul>`,
-	})
+.component('dragAndDropExample', {
+  template: `<ul ng-sortable>
+    <li ng-repeat="item in ['burgers', 'chips', 'hotdog']">
+      {$ item $}
+    </li>
+  </ul>`,
+})
 ```
 
 ## Specifying a Config
 You can pass a Config obj to `ng-sortable` and it will pass this onto the created sortable object. The available options can be found [here](https://github.com/RubaXa/Sortable#options)
 
 ```js
 angular.module('exampleApp', ['ng-sortable'])
-	.component('dragAndDropExample', {
-		template: `<ul ng-sortable=$ctrl.sortableConf>
-				<li ng-repeat="item in ['burgers', 'chips', 'hotdog']">
-					{$ item $}
-				</li>
-			</ul>`,
-		controller: function ComponentController() {
-			var ctrl = this;
-			ctrl.sortableConf = {
-				animation: 350,
-				chosenClass: 'sortable-chosen',
-				forceFallback: true,
-			};
-		},
-	});
+  .component('dragAndDropExample', {
+    template: `
+    <ul ng-sortable=$ctrl.sortableConf>
+      <li ng-repeat="item in ['burgers', 'chips', 'hotdog']">
+        {$ item $}
+      </li>
+    </ul>`,
+    controller: class ExampleController {
+      constructor() {
+        this.sortableConf = {
+          animation: 350,
+          chosenClass: 'sortable-chosen',
+          handle: '.grab-handle',
+          forceFallback: true,
+        };
+      }
+    },
+  });
 ```
 
 # Drag handle
 Example showing how use the handle option
 
 ```js
 angular.module('exampleApp', ['ng-sortable'])
-	.component('dragAndDropExample', {
-		template: `<ul ng-sortable=$ctrl.sortableConf>
-				<li ng-repeat="item in ['burgers', 'chips', 'hotdog']" draggable="false">
-					<span class="grab-handle">Drag Header</span>
-					<div>{$ item $}</div>
-				</li>
-			</ul>`,
-		controller: function ComponentController() {
-  		var ctrl = this;
-			ctrl.sortableConf = {
-				animation: 350,
-				chosenClass: 'sortable-chosen',
-				handle: '.grab-handle',
-				forceFallback: true,
-			};
-		},
-	});
+  .component('dragAndDropExample', {
+    template: `
+		<ul ng-sortable=$ctrl.sortableConf>
+      <li ng-repeat="item in ['burgers', 'chips', 'hotdog']" draggable="false">
+        <span class="grab-handle">Drag Header</span>
+        <div>{$ item $}</div>
+      </li>
+   </ul>`,
+   controller: class ExampleController {
+			constructor() {
+				this.sortableConf = {
+          animation: 350,
+          chosenClass: 'sortable-chosen',
+          handle: '.grab-handle',
+          forceFallback: true,
+        };
+      }
+    },
+  });
 ```