resolved https://github.com/ipython/ipython/issues/6259
resolved https://github.com/ipython/ipython/issues/6259

zalt50/iruby,zalt50/iruby,zalt50/iruby,SciRuby/iruby,zalt50/iruby,domitry/iruby,hainesr/iruby,SciRuby/iruby,domitry/iruby,hainesr/iruby,SciRuby/iruby,SciRuby/iruby