don't accidentally transform 'show' into 'obtains' (in general, more 'obtain's could be turned into 'have's, but this is not necessary for the correctness of the proof)
syntax: glob
*~
*.class
*.jar
*.marks
*.orig
*.rej
.DS_Store
.swp
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc/.*\.dvi
^doc/.*\.eps
^doc/.*\.pdf
^doc/.*\.ps
^src/Tools/jEdit/dist/