extensions.rb in rdf-vocab-3.2.5

- old
+ new

@@ -389,10 +389,10 @@
 
         # Template invoked with expanded JSON-LD with outer object including `rdfs_classes`, `rdfs_properties`, and `rdf_instances` sections.
         case template
         when /.haml$/
           require 'haml'
-          haml = if Haml.const_defined?(:Template)
+          haml = if Haml::VERSION >= "6"
             Haml::Template.new {File.read(template)}
           else
            Haml::Engine.new(File.read(template))
           end
           