Refactored and cleaned a minor bit in runner.rb

Signed-off-by: Ryan Davis <zenspider@chef.io>

lib/inspec/resources/file.rb

@@ -165,7 +165,7 @@ module Inspec::Resources
     end
 
     def to_s
-      if file then
+      if file
         "File #{source_path}"
       else
         "Bad File on %s" % [inspec.backend.class]

lib/inspec/runner.rb

@@ -255,7 +255,7 @@ module Inspec
 
       resource = arg[0]
       # check to see if we are using a filtertable object
-      resource = arg[0].resource if arg[0].class.superclass == FilterTable::Table
+      resource = resource.resource if resource.is_a? FilterTable::Table
       if resource.respond_to?(:resource_skipped?) && resource.resource_skipped?
         return rspec_skipped_block(arg, opts, resource.resource_exception_message)
       end