less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
even less intrusive PREFER_GOAL (without structural goal marker), e.g. relevant for generic_simp_tac;
adapted ZF proof that broke for unknown reasons (potentially slight change of Drule.size_of_thm);
syntax: glob
*~
*.class
*.jar
*.orig
*.rej
.DS_Store
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc/.*\.dvi
^doc/.*\.eps
^doc/.*\.pdf
^doc/.*\.ps
^src/Tools/jEdit/dist/