Ruby

test/unit: return the cursor

• test/lib/test/unit.rb (update_status): keep the cursor to the
  beginning of the line for each update, so that unexpected output
  like an error message will overwrite but not be concatenated to
  the status.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53982 b2dd03c8-39d4-4d8f-98ff-823fe69b080e