Fix minor doxygen nits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40854 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/LLVMBuilder.h

@@ -89,7 +89,7 @@ public:
     return Insert(new ReturnInst());
   }
 
-  /// CreateRet - Create a 'ret <val>' instruction.
+  /// @verbatim CreateRet - Create a 'ret <val>' instruction. @endverbatim
   ReturnInst *CreateRet(Value *V) {
     return Insert(new ReturnInst(V));
   }