clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;
<string>-Disabelle.home=$APP_ROOT/Contents/Resources/{ISABELLE_NAME}</string>
<string>-Disabelle.app=true</string>
</array>
<key>JVMArguments</key>
<array>
</array>
</dict>
</plist>