evolve: extract displayer to _solveone()
I extracted this displayer method to _solveone() so that it would be
easy to pass a different template to show evolve msgs. In upcoming
patches we will be using stacktemplate in some cases where we want
to include stack alias s# in evolve msgs.
#!/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