ROOTS

more sensible treatment of quasi-local variables (NB: Variable.add_fixes is only for term variables, while Variable.declare takes care of types within given terms);

src/Pure
src/FOL
src/HOL
src/ZF
src/CCL
src/CTT
src/Cube
src/FOLP
src/LCF
src/Sequents
src/Doc
src/Tools