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    Ep-

    Return the sorted list of non-builtin event names matching a given prefix

    See ep for an analogous utility that includes built-in event names in the result. In the following example, we see that ep- is similar but only considers names that are not built into ACL2, so for example the result below does not include the name with-output.

    Example:
    
    ACL2 !>(defmacro with-output-off (form)
             `(with-output :off :all :gag-mode t ,form))
    
    Summary
    Form:  ( DEFMACRO WITH-OUTPUT-OFF ...)
    Rules: NIL
    Time:  0.00 seconds (prove: 0.00, print: 0.00, other: 0.00)
     WITH-OUTPUT-OFF
    ACL2 !>:ep- with-output
    (WITH-OUTPUT-OFF)
    ACL2 !>