Changes

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

New material from the HOL Light metric space library, mostly about quasi components

Changeset 78038:2c1b01563163 by paulson _lp15@cam.ac.uk_: New material from the HOL Light metric space library, mostly about quasi components
The file was modified	`src/HOL/Analysis/Abstract_Topological_Spaces.thy`
The file was modified	`src/HOL/Analysis/Abstract_Topology.thy`