The old code printed (with ui.status()) the changeset ID created by
patch N after committing patch N+1, e.g.
applying patch1
applying patch2
applied 1d4bd90af0e4
where 1d4bd90af0e4 is the changeset ID resulting from patch1. That's
just weird. It's also inconsistent: we only reported the changeset ID
when applying >1 patches. And it's inconsistent with 'commit', which
only tells you the new changeset ID in verbose mode. Finally, the
existing code was I18N-hostile, since it concatenated translated
strings.
The new way is to print the just-created changeset ID with ui.note()
immediately after committing it. It also clarifies what the user
message is for easier I18N.
