convert: avoid updating tags when there is nothing new
Previously, when converting from a mercurial repo there would be an extraneous
commit at the end of the convert process that would rewrite tags. Now, we check
if there are any new tags before doing this rewriting.
# When --inotify is activated, help output and config changes:
test-debugcomplete
test-empty
test-fncache
test-globalopts
test-help
test-hgrc
test-inherit-mode
test-qrecord
test-strict
# --inotify activates de facto the inotify extension. It does not play well
# with inotify-specific tests, which activate/deactivate inotify at will:
test-inotify
test-inotify-debuginotify
test-inotify-dirty-dirstate
test-inotify-issue1208
test-inotify-issue1371
test-inotify-issue1542
test-inotify-issue1556
test-inotify-lookup