clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;
theory Spec_Check
imports Pure
begin
ML_file "random.ML"
ML_file "property.ML"
ML_file "base_generator.ML"
ML_file "generator.ML"
ML_file "gen_construction.ML"
ML_file "spec_check.ML"
ML_file "output_style.ML"
end