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  1. or download this
    ## case 1, with spaces in dir name
    my $dir = 'C:/foo/bar baz/';
    ...
    @xlfiles = <"$dir*.xls">;
    ## but this does...
    @xlfiles = <$dir*.xls>;
    
  2. or download this
    if ( "$dir" =~ /.*\s+.*/ ) {
       @xlfiles = <"$dir*.xls">;
    } else {
       @xlfiles = <$dir*.xls>;
    }