Relax the restriction on the let widget being unable to create variab…

…les starting with a dollar

core/modules/widgets/let.js

@@ -51,11 +51,9 @@ LetWidget.prototype.computeAttributes = function() {
 	$tw.utils.each($tw.utils.getOrderedAttributesFromParseTreeNode(this.parseTreeNode),function(attribute) {
 		var value = self.computeAttribute(attribute),
 			name = attribute.name;
-		if(name.charAt(0) !== "$") {
-			// Now that it's prepped, we're allowed to look this variable up
-			// when defining later variables
-			self.currentValueFor[name] = value;
-		}
+		// Now that it's prepped, we're allowed to look this variable up
+		// when defining later variables
+		self.currentValueFor[name] = value;
 	});
 	// Run through again, setting variables and looking for differences
 	$tw.utils.each(this.currentValueFor,function(value,name) {

editions/tw5.com/tiddlers/widgets/LetWidget.tid

@@ -1,5 +1,6 @@
 title: LetWidget
 created: 20211028115900000
+modified: 20221001094658854
 tags: Widgets
 caption: let
 
@@ -12,10 +13,12 @@ caption: let
 The content of the <<.wid let>> widget is the scope for the value assigned to the variable.
 
 |!Attribute |!Description |
-|//{attributes not starting with $}// |Each attribute name specifies a variable name. The attribute value is assigned to the variable |
+|//{attributes}// |Each attribute name specifies a variable name. The attribute value is assigned to the variable |
 
 Attributes are evaluated in the order they are written. Attributes with the same name are allowed. Each time a duplicate attribute is encountered, it will replace the existing value set by the earlier duplicate.
 
+<<.note """<<.from-version "5.2.4">> There is no longer any restriction on using variable names that start with the $ character.""">>
+
 ! Examples
 
 Consider a case where you need to set multiple variables, where some depend on the evaluation of others.