prune: use action "prune", not "touch", in precheck
We have been using "touch" since 06ee4ec88190 (prune: use precheck to
validate revision, 2017-07-23). That commit modified the tests, so it
kind seemed intentional, but I suspect it was still just an oversight.
#!/bin/bash
set -euox pipefail
unset GREP_OPTIONS
NOTOPIC="--config experimental.topic-mode=ignore"
compatbranches=`hg branches --quiet | grep 'mercurial-' | grep -v ':' | sort -n --reverse`
prev='stable'
for branch in $compatbranches; do
hg up $branch
hg merge $prev
hg commit -m "test-compat: merge $prev into $branch"
prev=$branch
done