exported opt_infix, opt_mixfix parsers;
removed 'subclass' section (now handled by 'instance');
improved make_syntax: section names now added automatically to keywords;
#! /bin/sh
#rm-logfiles: remove useless files from subdirectories
rm log */make*.log */make*.log.gz
rm */test
rm */.*.thy.ML
rm */ex/.*.thy.ML
rm HOL/Subst/.*.thy.ML