Forgot to add Expr to IMP.
#!/bin/sh
#make-dist <DIR>
#make a distribution directory of Isabelle sources. Example:
# rm -r /usr/groups/theory/isabelle/91
# make-dist /usr/groups/theory/isabelle/91
#BEFORE MAKING A NEW DISTRIBUTION VERSION, CHECK...
# * that make-all works perfectly
# * that README files are up-to-date
# * that the version number has been updated
#This version copies EVERYTHING!!!!!!!!!!!!!!!!
set -e #terminate if error
#Pure Isabelle
mkdir ${1?'No destination directory specified'}
cp -ipr . $1
#TO WRITE POLY/ML AND ISABELLE TAPES, USE SHELL SCRIPT write-dist
#TO PACK FOR EMAIL, USE SHELL SCRIPTS make-emaildist, send-emaildist