RE: completion.el: 1) has unnecessary macro code, 2) has no way to turn it off (?)

[Drew Adams]

    > 1) IIUC, all of the calls to macro `cmpl-statistics-block' 
    should be removed
    > from this library.
    
    > The macro does nothing, and most of the args passed to it (which are
    > ignored) are undefined anyway.
    
    > The comment introducing the macro says that the functionality 
    is defined in
    > library `completion-stats.el', which no longer exists, AFAICT.
    
    I'll let someone else decide whether that should be removed or not.
    
    > 1) IIUC, once you call `dynamic-completion-mode' to turn on 
    completion,
    > there is no way to turn it off. This should be made into a 
    proper minor mode.
    
    I've made it into a proper minor mode.
    
Thanks.