A few formula use ARGV.flag? instead of ARGV.include?. This made `audit` recognize a few undocumented instances of a '--devel' option, but we can just ignore that like '--HEAD' for now, and change the behavior if we decide they need to be documented explicitly in each formula. cf. Homebrew/homebrew#7456. Signed-off-by: Jack Nagel <jacknagel@gmail.com>