modify markup for sample code blocks to create line numbers w/o a list

Change-Id: I8d4da266458e1ae281ca5711bf17f0f35bb8511d
diff --git a/src/com/google/doclava/SampleTagInfo.java b/src/com/google/doclava/SampleTagInfo.java
index 4e14b2b..a69a3f3 100644
--- a/src/com/google/doclava/SampleTagInfo.java
+++ b/src/com/google/doclava/SampleTagInfo.java
@@ -108,9 +108,8 @@
 
   static String addLineNumber(String line, String num) {
     StringBuilder numberedLine = new StringBuilder();
-    numberedLine.append("<li id=\"" + num + "\">");
-    numberedLine.append(line);
-    numberedLine.append("</li>");
+    numberedLine.append("<a class=\"number\"" + "href=\"#l" + num + "\">" + num + "\n</a>");
+    numberedLine.append("<span class=\"code-line\" id=\"l" + num + "\">" + line + "</span>");
     return numberedLine.substring(0);
   }