eliminated "isabelle makedist" -- prefer Scala over bash/perl scripting;
eliminated "isabelle news";
roper title in NEWS.html;
more robust build of documentation, using proper Other_Isabelle settings: avoid conflict with enclosing ISABELLE_OCAML / ISABELLE_GHC;
misc tuning and clarification;
syntax: glob
*~
*.class
*.jar
*.marks
*.orig
*.rej
.DS_Store
.swp
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc/.*\.pdf
^src/Tools/jEdit/dist/
^src/Tools/VSCode/out/
^src/Tools/VSCode/extension/node_modules/
^Admin/jenkins/ci-extras/target/