define_state/new_state: provide state immediately, which is now lazy;
more careful document editing: single execution future forces all entries, synchronous cancelation after update;
syntax: glob
*~
*.class
*.jar
.DS_Store
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc-src/.*\.aux
^doc-src/.*\.bbl
^doc-src/.*\.blg
^doc-src/.*\.dvi
^doc-src/.*\.idx
^doc-src/.*\.ind
^doc-src/.*\.lof
^doc-src/.*\.log
^doc-src/.*\.out
^doc-src/.*\.rai
^doc-src/.*\.rao
^doc-src/.*\.toc
^src/Tools/jEdit/nbproject/private/
^src/Tools/jEdit/build/
^src/Tools/jEdit/dist/
^src/Tools/jEdit/contrib/