fix validator errors

llvm-svn: 66688
diff --git a/llvm/docs/tutorial/LangImpl4.html b/llvm/docs/tutorial/LangImpl4.html
index 7e1fcfa..9a3bfd2 100644
--- a/llvm/docs/tutorial/LangImpl4.html
+++ b/llvm/docs/tutorial/LangImpl4.html
@@ -87,7 +87,7 @@
 </pre>
 </div>
 
-Constant folding, as seen above, in particular, is a very common and very
+<p>Constant folding, as seen above, in particular, is a very common and very
 important optimization: so much so that many language implementors implement
 constant folding support in their AST representation.</p>