clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;
# -*- shell-script -*- :mode=shellscript:
MUTABELLE_HOME="$COMPONENT"
MUTABELLE_LOGIC=HOL
MUTABELLE_IMPORT_THEORY=Complex_Main
MUTABELLE_NUMBER_OF_MUTANTS=4
MUTABELLE_NUMBER_OF_MUTATIONS=1
ISABELLE_TOOLS="$ISABELLE_TOOLS:$MUTABELLE_HOME/lib/Tools"