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use strict;
use warnings;
...
    matches_found( @matches );
}

if ($event eq 'JOIN') {  # indent your code.  It doesn't matter if you
+ use tabs, 2 spaces, or 4 spaces per level, with GNU or K&R or any ot
+her bracketing.  Just pick a style and use it.

...
}

}

if ($event eq 'JOIN') {

...
        }    
    }
}