test/unit: refine output in job_status=normal
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test/unit: refine output in job_status=normal
status of only changed woker, not to show same lines repeatedly,
in normal job_status mode.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53956 b2dd03c8-39d4-4d8f-98ff-823fe69b080e