puppetlabs/facter — pull request #667 by peterhuene (2014-04-23 23:45:04+00:00)
Title: (FACT-459) Fix MTU interface facts not being reported for Archlinux.

The regular expression being used assumes that MTU is uppercase and
followed by a colon. On Archlinux, ifconfig (net-tools 1.60+) reports
a lowercase "mtu" followed by a space.