Update Vendored Erubis to 2.6.6

vendor/plugins/erubis/examples/basic/example.escheme

@@ -0,0 +1,26 @@
+<%
+(let ((user "Erubis")
+      (items '("<aaa>" "b&b" "\"ccc\""))
+      (i 0))
+ %>
+<p>Hello <%= user %>!</p>
+<table>
+  <tbody>
+<%
+  (for-each
+   (lambda (item)
+     (set! i (+ i 1))
+ %>
+    <tr bgcolor="<%= (if (= (modulo i 2) 0) "#FFCCCC" "#CCCCFF") %>">
+      <td><%= i %></td>
+      <td><%= item %></td>
+    </tr>
+<%
+   ) ; lambda end
+   items) ; for-each end
+ %>
+  </tbody>
+</table>
+<%
+) ; let end
+%>