added functions that operate on filenames: split_filename (originally located
in Pure/read.ML), tack_on, remove_ext
#! /bin/sh
#rm-logfiles: remove useless files from subdirectories
rm log */make*.log */make*.log.gz */make*.log.z
rm */test
rm */.*.thy.ML
rm */ex/.*.thy.ML
rm HOL/Subst/.*.thy.ML