more standard Thy_Load.check_thy for Pure.thy, relying on its header;
pass uses and keywords from Thy_Load.check_thy to Thy_Info.load_thy;
clarified 'ML_file' wrt. Thy_Load.require/provide, which is also relevant for Thy_Load.all_current;
syntax: glob
*~
*.class
*.jar
*.orig
*.rej
.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/.*\.toc
^src/Tools/jEdit/dist/