lib/prawn/document.rb in prawn-2.0.2 vs lib/prawn/document.rb in prawn-2.1.0

@@ -55,9 +55,10 @@
     include Prawn::Text
     include Prawn::Graphics
     include Prawn::Images
     include Prawn::Stamp
     include Prawn::SoftMask
+    include Prawn::TransformationStack
 
     # @group Extension API
 
     # NOTE: We probably need to rethink the options validation system, but this
     # constant temporarily allows for extensions to modify the list.