Changes

Changes from Mercurial (hg http://isabelle.in.tum.de/repos/isabelle/ default)

tweak Sledgehammer's slicing mechanism -- updated Zipperposition's slices and make them half as long as other provers' to pack more of them in 30 s

Changeset 75872:8bfad7bc74cb by blanchet: tweak Sledgehammer's slicing mechanism -- updated Zipperposition's slices and make them half as long as other provers' to pack more of them in 30 s
The file was modified	`src/Doc/Sledgehammer/document/root.tex`
The file was modified	`src/HOL/Tools/SMT/smt_systems.ML`
The file was modified	`src/HOL/Tools/Sledgehammer/sledgehammer.ML`
The file was modified	`src/HOL/Tools/Sledgehammer/sledgehammer_atp_systems.ML`
The file was modified	`src/HOL/Tools/Sledgehammer/sledgehammer_commands.ML`