Switched empty block handling for expression blocks to use helperMissing.not.

lib/handlebars.js

@@ -178,14 +178,21 @@ var Handlebars = {
     var out = "";
     if (Handlebars.isFunction(lookup)) {
       out = out + lookup.call(context, arg, fn);
+      if (notFn != null && Handlebars.isFunction(lookup.not)) {
+        out = out + lookup.not.call(context, arg, notFn); 
+      } 
     }
-    else if (typeof lookup != 'undefined') {
-      out = out + Handlebars.helperMissing.call(arg, lookup, fn);
+    else {
+      if (!Handlebars.isEmpty(lookup)) {
+        out = out + Handlebars.helperMissing.call(arg, lookup, fn);
+      }
+      
+      if (notFn != null) {
+        out = out + Handlebars.helperMissing.not.call(arg, lookup, notFn);
+      }
     }
 
-    if (notFn != null && Handlebars.isFunction(lookup.not)) {
-      out = out + lookup.not.call(context, arg, notFn); 
-    }
+    
 
     return out;
   },
@@ -256,6 +263,9 @@ Handlebars.helperMissing = function(object, fn) {
 		return fn(object);
 	}
 };
+Handlebars.helperMissing.not = function(context, fn) {
+  return fn(context);
+}
 
 Handlebars.Compiler.prototype = {
   getChar: function(n) {

test/handlebars.js

@@ -267,6 +267,11 @@ test("nested block helpers", function() {
 });
 
 test("block inverted sections", function() {
+  shouldCompileTo("{{#people}}{{name}}{{^}}{{../none}}{{/people}}", {none: "No people"}, 
+    "No people");
+});
+
+test("block helper inverted sections", function() {
   var string = "{{#list people}}{{name}}{{^}}<em>Nobody's here</em>{{/list}}"
   var list = function(context, fn) { 
     if (context.length > 0) {