It seems like "indent the whole tree" is about to become a minority
use-case. Maybe instead of continuing to privilege that case, we
should say that it's invoked by some new switch like --all-files,
and without that only the stuff identified by command-line arguments
gets processed.
I don't think we need --all-files. The attached gets rid of the build
and code-base cruft, which is now in any case obsolete given we've put
pg_bsd_indent in our code base. So the way to spell this instead of
"pgindent --all-files" would be "pgindent ."
Ah, of course.
I added a warning if there are no files at all specified.
