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    Replaced EQ with EQT and SUBTYPEP with SUBTYPEP* in many places. · 5d7f0d72
    pfdietz authored
    These are the same as the original except they are guaranteed to
    return T when a true value is to be returned.
    
    Added NOTNOT, which coerces true to T.
    
    These changes are intended to make the test more fully standard compliant,
    avoiding the unwarranted assumption that a function that returns true
    is returning T (even though this is the case in many implementations.)
    
    Added tests for NIL, T, NOT, and NULL.
    5d7f0d72