added a test case

src/blocks.js

@@ -148,7 +148,7 @@ CustomCommandBlockMorph, SymbolMorph, ToggleButtonMorph, DialMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.blocks = '2020-January-06';
+modules.blocks = '2020-February-13';
 
 var SyntaxElementMorph;
 var BlockMorph;
@@ -13570,3 +13570,15 @@ ScriptFocusMorph.prototype.reactToKeyEvent = function (key) {
         }
     }
 };
+
+// register examples with the World demo menu
+// comment out to shave off a millisecond loading speed ;-)
+
+(function () {
+    BlockMorph.prototype.addToDemoMenu([
+        'Syntax',
+        [
+            [new CommandBlockMorph(), 'Command']
+        ]
+    ]);
+})();

src/symbols.js

@@ -1801,14 +1801,15 @@ SymbolMorph.prototype.renderSymbolGlobe = function (ctx, color) {
        
     SymbolMorph.prototype.addToDemoMenu([
         'Symbols',
-        SymbolMorph.prototype.names.map(sym =>
+        SymbolMorph.prototype.names.map(sym => [
             new SymbolMorph(
                 sym,
                 30,
                 bright,
                 offset,
                 dark
-            )
+            ),
-        )
+            sym
+        ])
     ]);
 })();