no_document use_thys
   ["Ex/Classical",    
    "Ex/CoreHaskell",
    "Ex/Datatypes",
    "Ex/Ex1",
    "Ex/ExPS3",
    "Ex/Multi_Recs",
    "Ex/Multi_Recs2",
    "Ex/LF",
    "Ex/Lambda",
    "Ex/Let",
    "Ex/LetPat",
    "Ex/LetRec",
    "Ex/LetRec2",
    "Ex/LetFun",
    "Ex/Modules",
    "Ex/SingleLet",
    "Ex/TypeSchemes",
    "Ex/TypeVarsTest"
    ];