Fix for defect #180, SVG foreignObject rendering

test/examples/leadingComments.html

@@ -27,5 +27,14 @@
             Ali#45;ce->>John: Hello John, how are you? #60;
             John-->>Alice: Great!#quot;
         </div>
+        <div class="mermaid" id="i211">
+            graph LR;
+            A[Hard edge]-->|Link text|B(Round edge);
+            B-->C{Decision};
+            C-->|One|D[Result one];
+            C-->|Two|E[Result two];
+            classDef pink fill:#f9f,stroke:#333,stroke-width:4px;
+            class C pink;
+        </div>
     </body>
 </html>