aefb898 this commit back-port several fixes relevant to camlp4: please see Changes for more details

Authored and Committed by Hongbo Zhang 10 years ago
    this commit back-port  several fixes  relevant to camlp4: please see Changes for more details  
    
    git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.01@14253 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
    
        
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