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    >   	  587825  Defl:N   148954  75% 6761d877
    >   INSTALL
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    >   ...

Browsers have a bug of not checking for updated css & javascript.  A common
workaround is to add a hex number to those file names.  In that case use only
the meaningful part of the filename as a key:

    pl -o 'piped {
            keydiff $2
                if s@.{16} ([\da-f]{8})  (.+?)(?:\.([0-9a-f]{20})(\..[a-z]+))?$@if( $3 ) {
                    $n = "$2.\$x$4"; "$1  \$x=$3"
                } else {
                    $n = $2; $1
                }@e