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/tutorial/OCamlLangImpl6.html b/docs/tutorial/OCamlLangImpl6.html
index c5772a2..693aafc 100644
--- a/docs/tutorial/OCamlLangImpl6.html
+++ b/docs/tutorial/OCamlLangImpl6.html
@@ -12,7 +12,7 @@
 
 <body>
 
-<div class="doc_title">Kaleidoscope: Extending the Language: User-defined Operators</div>
+<h1>Kaleidoscope: Extending the Language: User-defined Operators</h1>
 
 <ul>
 <li><a href="index.html">Up to Tutorial Index</a></li>
@@ -38,7 +38,7 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="intro">Chapter 6 Introduction</a></div>
+<h2><a name="intro">Chapter 6 Introduction</a></h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -64,7 +64,7 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="idea">User-defined Operators: the Idea</a></div>
+<h2><a name="idea">User-defined Operators: the Idea</a></h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -129,7 +129,7 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="binary">User-defined Binary Operators</a></div>
+<h2><a name="binary">User-defined Binary Operators</a></h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -320,7 +320,7 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="unary">User-defined Unary Operators</a></div>
+<h2><a name="unary">User-defined Unary Operators</a></h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -472,7 +472,7 @@
 </div>
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="example">Kicking the Tires</a></div>
+<h2><a name="example">Kicking the Tires</a></h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">
@@ -778,7 +778,7 @@
 
 
 <!-- *********************************************************************** -->
-<div class="doc_section"><a name="code">Full Code Listing</a></div>
+<h2><a name="code">Full Code Listing</a></h2>
 <!-- *********************************************************************** -->
 
 <div class="doc_text">