docs: Introduce cascading style <div> and <p> continued on <h[2-5]>.

<h2>Section Example</h2>
<div> <!-- h2+div is applied -->
<p>Section preamble.</p>

<h3>Subsection Example</h3>
<p> <!-- h3+p is applied -->
Subsection body
</p>

<!-- End of section body -->
</div>

FIXME: Care H5 better.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130040 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/Lexicon.html b/docs/Lexicon.html
index 458da80..b1c2638 100644
--- a/docs/Lexicon.html
+++ b/docs/Lexicon.html
@@ -14,7 +14,7 @@
 <!-- *********************************************************************** -->
 <h2>Table Of Contents</h2>
 <!-- *********************************************************************** -->
-<div class="doc_text">
+<div>
   <table>
     <tr><th colspan="8"><b>- <a href="#A">A</a> -</b></th></tr>
     <tr>
@@ -85,9 +85,10 @@
 <!-- *********************************************************************** -->
 <h2>Definitions</h2>
 <!-- *********************************************************************** -->
+<div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="A">- A -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="ADCE"><b>ADCE</b></a></dt>
     <dd>Aggressive Dead Code Elimination</dd>
@@ -95,7 +96,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="B">- B -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="BURS"><b>BURS</b></a></dt>
     <dd>Bottom Up Rewriting System&mdash;A method of instruction selection for
@@ -105,7 +106,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="C">- C -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="CSE"><b>CSE</b></a></dt>
     <dd>Common Subexpression Elimination. An optimization that removes common
@@ -117,7 +118,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="D">- D -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="DAG"><b>DAG</b></a></dt>
     <dd>Directed Acyclic Graph</dd>
@@ -137,7 +138,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="G">- G -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="GC"><b>GC</b></a></dt>
     <dd>Garbage Collection. The practice of using reachability analysis instead
@@ -146,7 +147,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="H">- H -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="Heap"><b>Heap</b></a></dt>
     <dd>In garbage collection, the region of memory which is managed using
@@ -155,7 +156,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="I">- I -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="IPA"><b>IPA</b></a></dt>
     <dd>Inter-Procedural Analysis. Refers to any variety of code analysis that
@@ -170,7 +171,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="L">- L -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="LCSSA"><b>LCSSA</b></a></dt>
     <dd>Loop-Closed Static Single Assignment Form</dd>
@@ -184,7 +185,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="M">- M -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="MC"><b>MC</b></a></dt>
     <dd>Machine Code</dd>
@@ -192,7 +193,7 @@
 </div>
 <!-- _______________________________________________________________________ -->
 <h3><a name="O">- O -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="Object_Pointer"><b>Object Pointer</b></a></dt>
     <dd>A pointer to an object such that the garbage collector is able to trace
@@ -203,7 +204,7 @@
 
 <!-- _______________________________________________________________________ -->
 <h3><a name="P">- P -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="PRE"><b>PRE</b></a></dt>
     <dd>Partial Redundancy Elimination</dd>
@@ -212,7 +213,7 @@
 
 <!-- _______________________________________________________________________ -->
 <h3><a name="R">- R -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
   	<dt><a name="RAUW"><b>RAUW</b></a></dt> <dd>An abbreviation for Replace
   	All Uses With. The functions User::replaceUsesOfWith(), 
@@ -235,7 +236,7 @@
 
 <!-- _______________________________________________________________________ -->
 <h3><a name="S">- S -</a></h3>
-<div class="doc_text">
+<div>
   <dl>
     <dt><a name="Safe_Point"><b>Safe Point</b></a></dt>
     <dd>In garbage collection, it is necessary to identify <a href="#Root">stack
@@ -261,6 +262,8 @@
     function.</dd>
   </dl>
 </div>
+
+</div>
 <!-- *********************************************************************** -->
 <hr>
 <address> <a href="http://jigsaw.w3.org/css-validator/check/referer"><img