apt resource fails corner cases with optional second column

[grimm26]

Description

If a deb source line is something like:
deb [arch=amd64] "http://apt.somewhere.com" trusty default
or
deb [trusted=yes] "https://packages.chef.io/stable-apt" trusty main
the read_debs method is thrown off and puts arch=amd64 or trusted=yes as the url, etc etc.

InSpec and Platform Version

inspec 1.2.0 on OSX El Capitan (running with kitchen-inspec on various debian platforms).

Replication Case

Have an entry in an apt source list like the one I describe above.

Possible Solutions

Have the parser handle something in the "second column" that is not a URL and drop it if so.

Stacktrace

Please include the stacktrace output or link to a gist of it, if there is one.

[chris-rock]

@grimm26 Great finding. We need to adapt this regular expression then https://github.com/chef/inspec/blob/master/lib/resources/apt.rb#L92