diff --git a/core/modules/widgets/action-listops.js b/core/modules/widgets/action-listops.js
index 4e8e8694f..de866619f 100644
--- a/core/modules/widgets/action-listops.js
+++ b/core/modules/widgets/action-listops.js
@@ -8,84 +8,84 @@ Action widget to apply list operations to any tiddler field (defaults to the 'li
 \*/
 (function () {
 
-    /*jslint node: true, browser: true */
-    /*global $tw: false */
-    "use strict";
+	/*jslint node: true, browser: true */
+	/*global $tw: false */
+	"use strict";
 
-    var Widget = require("$:/core/modules/widgets/widget.js")
-        .widget;
+	var Widget = require("$:/core/modules/widgets/widget.js")
+		.widget;
 
-    var ActionListopsWidget = function (parseTreeNode, options) {
-        this.initialise(parseTreeNode, options);
-    };
+	var ActionListopsWidget = function (parseTreeNode, options) {
+		this.initialise(parseTreeNode, options);
+	};
 
-    /*
-    Inherit from the base widget class
-    */
-    ActionListopsWidget.prototype = new Widget();
+	/*
+	Inherit from the base widget class
+	*/
+	ActionListopsWidget.prototype = new Widget();
 
-    /*
-    Render this widget into the DOM
-    */
-    ActionListopsWidget.prototype.render = function (parent, nextSibling) {
-        this.computeAttributes();
-        this.execute();
-    };
+	/*
+	Render this widget into the DOM
+	*/
+	ActionListopsWidget.prototype.render = function (parent, nextSibling) {
+		this.computeAttributes();
+		this.execute();
+	};
 
-    /*
-    Compute the internal state of the widget
-    */
-    ActionListopsWidget.prototype.execute = function () {
-        // Get our parameters
-        this.target = this.getAttribute("$tiddler", this.getVariable("currentTiddler"));
-        this.filter = this.getAttribute("$filter");
-        this.subfilter = this.getAttribute("$subfilter");
-        this.listField = this.getAttribute("$field", "list");
-        this.listIndex = this.getAttribute("$index");
-        this.filtertags = this.getAttribute("$tags");
-    };
+	/*
+	Compute the internal state of the widget
+	*/
+	ActionListopsWidget.prototype.execute = function () {
+		// Get our parameters
+		this.target = this.getAttribute("$tiddler", this.getVariable("currentTiddler"));
+		this.filter = this.getAttribute("$filter");
+		this.subfilter = this.getAttribute("$subfilter");
+		this.listField = this.getAttribute("$field", "list");
+		this.listIndex = this.getAttribute("$index");
+		this.filtertags = this.getAttribute("$tags");
+	};
 
-    /*
-    Refresh the widget by ensuring our attributes are up to date
-    */
-    ActionListopsWidget.prototype.refresh = function (changedTiddlers) {
-        var changedAttributes = this.computeAttributes();
-        if (changedAttributes.$tiddler || changedAttributes.$filter || changedAttributes.$subfilter || changedAttributes.$list || changedAttributes.$index || changedAttributes.$tags) {
-            this.refreshSelf();
-            return true;
-        }
-        return this.refreshChildren(changedTiddlers);
-    };
+	/*
+	Refresh the widget by ensuring our attributes are up to date
+	*/
+	ActionListopsWidget.prototype.refresh = function (changedTiddlers) {
+		var changedAttributes = this.computeAttributes();
+		if (changedAttributes.$tiddler || changedAttributes.$filter || changedAttributes.$subfilter || changedAttributes.$list || changedAttributes.$index || changedAttributes.$tags) {
+			this.refreshSelf();
+			return true;
+		}
+		return this.refreshChildren(changedTiddlers);
+	};
 
-    /*
-    Invoke the action associated with this widget
-    */
-    ActionListopsWidget.prototype.invokeAction = function (triggeringWidget, event) {
-        //Apply the specified filters to the lists
-        var field = this.listField,
-            index = undefined,
-            type = "!!",
-            list = this.listField;
-        if (this.listIndex) {
-            field = undefined;
-            index = this.listIndex;
-            type = "##";
-            list = this.listIndex;
-        }
-        if (this.filter) {
-            this.wiki.setText(this.target, field, index, $tw.utils.stringifyList(this.wiki.filterTiddlers(this.filter, this)));
-        }
-        if (this.subfilter) {
-            var subfilter = "[list[" + this.target + type + list + "]] " + this.subfilter;
-            this.wiki.setText(this.target, field, index, $tw.utils.stringifyList(this.wiki.filterTiddlers(subfilter, this)));
-        }
-        if (this.filtertags) {
-            var tagfilter = "[list[" + this.target + "!!tags]] " + this.filtertags;
-            this.wiki.setText(this.target, "tags", undefined, $tw.utils.stringifyList(this.wiki.filterTiddlers(tagfilter, this)));
-        }
-        return true; // Action was invoked
-    };
+	/*
+	Invoke the action associated with this widget
+	*/
+	ActionListopsWidget.prototype.invokeAction = function (triggeringWidget, event) {
+		//Apply the specified filters to the lists
+		var field = this.listField,
+			index = undefined,
+			type = "!!",
+			list = this.listField;
+		if (this.listIndex) {
+			field = undefined;
+			index = this.listIndex;
+			type = "##";
+			list = this.listIndex;
+		}
+		if (this.filter) {
+			this.wiki.setText(this.target, field, index, $tw.utils.stringifyList(this.wiki.filterTiddlers(this.filter, this)));
+		}
+		if (this.subfilter) {
+			var subfilter = "[list[" + this.target + type + list + "]] " + this.subfilter;
+			this.wiki.setText(this.target, field, index, $tw.utils.stringifyList(this.wiki.filterTiddlers(subfilter, this)));
+		}
+		if (this.filtertags) {
+			var tagfilter = "[list[" + this.target + "!!tags]] " + this.filtertags;
+			this.wiki.setText(this.target, "tags", undefined, $tw.utils.stringifyList(this.wiki.filterTiddlers(tagfilter, this)));
+		}
+		return true; // Action was invoked
+	};
 
-    exports["action-listops"] = ActionListopsWidget;
+	exports["action-listops"] = ActionListopsWidget;
 
 })();