use HOL_basic_ss instead of HOL_ss for internal simproc proofs (cf. b36eedcd1633)
## targets
default: dvi
## dependencies
dvi:
cd Isar/document; make dvi
pdf:
cd Isar/document; make pdf
clean:
cd Isar/document; make clean
mrproper:
rm -f *.pdf *.dvi
cd Isar/document; make mrproper