Please wrap output from apt-acher-ng cron job

I have run into a problem, where dma (a sendmail replacement) refuses to accept the output from anacron, because it contains lines longer that 1000 bytes.

The line that is causing the problem is from:

  /etc/cron.daily/apt-cacher-ng:
  Error(s) occured while updating volatile index files for apt-cacher-ng.
  Please visit http://lenny:3142/acng-report.html to rerun the
  expiration manually or check the error message(s) in the current log file(s).

  Check error messages in /var/log/apt-cacher-ng/maint_1340793800.log /var/log/apt-cacher-ng/maint_1340881914.log [...] /var/log/apt-cacher-ng/maint_1351765343.log /var/log/apt-cacher-ng/maint_1351860019.log

The untrimmed line is almost 5000 characters long.

apt-cacher-ng should probably wrap the lines after ~80 characters or put the filenames on a single line (as a dash-prefixed list).

The output appears to come from the /etc/cron.daily/apt-cacher-ng script:

    perl /usr/lib/apt-cacher-ng/expire-caller.pl || echo Check error messages in /var/log/apt-cacher-ng/maint_*.log

When executing the "expire-caller" script which is failing I get this output:

    $ sudo perl /usr/lib/apt-cacher-ng/expire-caller.pl
    Error(s) occured while updating volatile index files for apt-cacher-ng.
    Please visit http://lenny:3142/acng-report.html to rerun the
    expiration manually or check the error message(s) in the current log file(s).