Default to terse version 3

4 will include the trim output, and we'll augment that with json output
as well. To avoid breaking anyone who's using the git pulls for their
testing, we'll default to version 3 for now.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/README b/README
index c629e2d..a135017 100644
--- a/README
+++ b/README
@@ -126,7 +126,7 @@
 	--bandwidth-log		Generate per-job bandwidth logs
 	--minimal		Minimal (terse) output
 	--version		Print version info and exit
-	--terse-version=type	Terse version output format (default 3, or 2).
+	--terse-version=type	Terse version output format (default 3, or 2 or 4).
 	--help			Print this page
 	--cmdhelp=cmd		Print command help, "all" for all of them
 	--enghelp=engine	Print ioengine help, or list available ioengines