highway=motorway not rendered with direction arrows

[naoliv]

I was trying to debug this routing problem in JOSM:

And I really couldn't find anything wrong.

Then, cliking at the highway segments I saw that they didn't any oneway tag.
Since highway=motorway implies oneway=yes (this is what we have in ​http://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway and it's also how the routing programs use it), JOSM should draw the direction arrows on highway=motorway with oneway!=no (different from no)

As it's now we have a highway=motorway without oneway drawn exactly like a highway=motorway + oneway=no

JOSM

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2015-06-22 11:23:21
Last Changed Author: Don-vip
Revision: 8520
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2015-06-22 13:20:28 +0200 (Mon, 22 Jun 2015)
Last Changed Rev: 8520

Identification: JOSM/1.5 (8520 pt_BR) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 247 MB / 4029 MB (148 MB allocated, but free)
Java version: 1.7.0_79, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u79-2.5.5-1
VM arguments: [-Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found