Changes

Changes from Mercurial (hg https://foss.heptapod.net/isa-afp/afp-devel/ default)

added equivalence of concepts between First_Order_Terms.Position and HOL-Library.Sublist

Changeset 14290:d8aa8cc91178 by desharna: added equivalence of concepts between First_Order_Terms.Position and HOL-Library.Sublist
The file was modified	`thys/First_Order_Terms/Position.thy`