Fix DocServletTest for new CSS

In addition to some minor tag arrangement changes, we no longer repeat
the top-level page title in the title bar.

Change-Id: Ieb74ccd93894873e16909c632f6b2cc48ca6a7ac

gitiles-servlet/src/test/java/com/google/gitiles/doc/DocServletTest.java

diff --git a/gitiles-servlet/src/test/java/com/google/gitiles/doc/DocServletTest.java b/gitiles-servlet/src/test/java/com/google/gitiles/doc/DocServletTest.java
index a2a0a2e..c5d461f 100644
--- a/gitiles-servlet/src/test/java/com/google/gitiles/doc/DocServletTest.java
+++ b/gitiles-servlet/src/test/java/com/google/gitiles/doc/DocServletTest.java
@@ -57,8 +57,7 @@
     String html = buildHtml("/repo/+doc/master/README.md");
     assertThat(html).contains("<title>Site Title - page</title>");
 
-    assertThat(html).contains("<h1>Site Title</h1>");
-    assertThat(html).contains("<h2>page</h2>");
+    assertThat(html).contains("<span class=\"Header-anchorTitle\">Site Title</span>");
     assertThat(html).contains("<li><a href=\"index.md\">Home</a></li>");
     assertThat(html).contains("<li><a href=\"README.md\">README</a></li>");
     assertThat(html).contains("<h1>"