docs: revision numbers are technically stable
From `hg help glossary`: "Note that the revision number may be different in
each clone of a repository." But cloning the same repo multiple times yields
the same result, and that shows that revision numbers are stable.
#!/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