.pi/extensions/_shared/ is installed by deploy-scenario.sh from shared/extensions/
and is not in the scenario's workspace/, so pi-diff listed it as merely
"UNTRACKED in live workspace" -- no comparison at all. The file most likely to
drift, because it is the one shared between scenarios, was the one the diff had
nothing to say about.
Now compared against shared/extensions/ and reported like any other file, with a
missing source called out separately.
Also fixes the counter: the new branch incremented a variable named `changed`
while the summary reads `DIFFS`, so a detected difference printed a diff and then
claimed the installation agreed, and exited 0. Verified by planting drift: exit 1
and "1 difference(s) found", then 0 after redeploying.
Kai
1415037e6a