Tweak wording

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71611 91177308-0d34-0410-b5e6-96231b3b80d8

docs/UsersManual.html

@@ -620,7 +620,7 @@ These extensions are not anywhere near complete, so please do not
 file bugs; patches are welcome, though.</p>
 
 <li>clang does not support the Microsoft extension where anonymous
-record members can be declared using user defined types.</li>
+record members can be declared using user defined typedefs.</li>
 
 <!-- ======================================================================= -->
 <h2 id="objc">Objective-C Language Features</h2>