clarified options ML_source_trace and ML_exception_trace (NB: the latter needs to be a system option, since the context is sometimes not available, e.g. for 'theory' command);
syntax: glob
*~
*.class
*.jar
*.orig
*.rej
.DS_Store
.swp
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc/.*\.dvi
^doc/.*\.eps
^doc/.*\.pdf
^doc/.*\.ps
^src/Tools/jEdit/dist/