docs: Use <Hn> as Heading elements instead of <DIV class="doc_foo">.

H1 ... doc_title
H2 ... doc_section
H3 ... doc_subsection
H4 ... doc_subsubsection

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129736 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/Bugpoint.html b/docs/Bugpoint.html
index 6bbc9b7..5568fc7 100644
--- a/docs/Bugpoint.html
+++ b/docs/Bugpoint.html
@@ -6,9 +6,9 @@
   <link rel="stylesheet" href="llvm.css" type="text/css">
 </head>
 
-<div class="doc_title">
+<h1>
   LLVM bugpoint tool: design and usage
-</div>
+</h1>
 
 <ul>
   <li><a href="#desc">Description</a></li>
@@ -27,9 +27,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
 <a name="desc">Description</a>
-</div>
+</h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -50,9 +50,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
 <a name="design">Design Philosophy</a>
-</div>
+</h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -71,9 +71,9 @@
 </div>
 
 <!-- ======================================================================= -->
-<div class="doc_subsection">
+<h3>
   <a name="autoselect">Automatic Debugger Selection</a>
-</div>
+</h3>
 
 <div class="doc_text">
 
@@ -104,9 +104,9 @@
 </div>
 
 <!-- ======================================================================= -->
-<div class="doc_subsection">
+<h3>
   <a name="crashdebug">Crash debugger</a>
-</div>
+</h3>
 
 <div class="doc_text">
 
@@ -129,9 +129,9 @@
 </div>
 
 <!-- ======================================================================= -->
-<div class="doc_subsection">
+<h3>
   <a name="codegendebug">Code generator debugger</a>
-</div>
+</h3>
 
 <div class="doc_text">
 
@@ -150,9 +150,9 @@
 </div>
 
 <!-- ======================================================================= -->
-<div class="doc_subsection">
+<h3>
   <a name="miscompilationdebug">Miscompilation debugger</a>
-</div>
+</h3>
 
 <div class="doc_text">
 
@@ -167,9 +167,9 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section">
+<h2>
   <a name="advice">Advice for using bugpoint</a>
-</div>
+</h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">