To reduce the amount of output, prefer --tty=no instead of
--color=never. This option not only disables color output but also
kill some tty-related features, like spinners. Travis limits its
output by the physical size of the log, not by the number of lines.
This change should make more room for new logs.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65702 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
