Update text to point people at the right version of the tutorial for

their release.

llvm-svn: 51638

llvm/docs/tutorial/LangImpl3.html

@@ -48,7 +48,11 @@ parser than it is to generate LLVM IR code. :)
 </p>
 
 <p><b>Please note</b>: the code in this chapter and later require LLVM 2.2 or
-LLVM SVN to work.  LLVM 2.1 and before will not work with it.</p>
+later.  LLVM 2.1 and before will not work with it.  Also note that you need
+to use a version of this tutorial that matches your LLVM release: If you are
+using an official LLVM release, use the version of the documentation included
+with your release or on the <a href="http://llvm.org/releases/">llvm.org 
+releases page</a>.</p>
 
 </div>