What happened to one expression-bound variable's expression between two
versions of the argument a response answers, read from targetFrom to
targetTo. Nothing compares the two version numbers, so targetTo may be
the older one; each label then reads in that direction.
unchanged: re-pointed by a rebase with no decision.
changed: still present, but differs as reasons says; needs a
decision.
removed: absent from targetTo; needs a decision. Read from a newer
version back to an older one, it means the expression was added in the
newer version.
alreadyRebased: already bound to targetTo, and its expression is
present there.
What happened to one expression-bound variable's expression between two versions of the argument a response answers, read from
targetFromtotargetTo. Nothing compares the two version numbers, sotargetTomay be the older one; each label then reads in that direction.unchanged: re-pointed by a rebase with no decision.changed: still present, but differs asreasonssays; needs a decision.removed: absent fromtargetTo; needs a decision. Read from a newer version back to an older one, it means the expression was added in the newer version.alreadyRebased: already bound totargetTo, and its expression is present there.