Unchanged since last release:
unchanged since v5.1
Unchanged for at least 2 releases:
unchanged v4.2 bits (re-added in v5.1)
unchanged since v5.0 bits
Remember, the spotlight here is on the new stuff. Everything unchanged for at least two releases is depicted in a smaller font as we also wish to emphasis its candidacy for being moved off the dynamic Toolbox to the static "Golden Oldies" archive series (expect to see this manifest with the v6.1 DT CD-set release).