Use unless, instead of negated if

Author: amandaharth

lib/puppet/resource_api.rb

@@ -265,7 +265,7 @@ def self.rsapi_provider_get(names = nil)
           rsapi_provider_get_cache.add(build_title(type_definition, resource_hash), resource_hash)
         end
 
-        if !type_definition.feature?('simple_get_filter')
+        unless type_definition.feature?('simple_get_filter')
           # Mark the cache as having all possible instances:
           rsapi_provider_get_cache.cached_all
         end