ROOTS

back to compression in Isabelle/Scala (in contrast to f7174238b5e3), e.g. relevant for old_command_timings_blob, but also for prospective heaps;

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