Fix test suite for robot-name excercise
Fix test suite for robot-name excercise

NeimadTL/ruby,mamenama/xruby,tommyschaefer/xruby,NeimadTL/ruby,Insti/xruby,Insti/exercism-ruby,Calvyn82/word_count,kickinbahk/xruby,jdsayle/xruby,mamenama/xruby,kotp/xruby,exercism/xruby,remcopeereboom/xruby,remcopeereboom/xruby,NobbZ/xruby,rashmiagar/exercism,Insti/xruby,darrencauthon/xruby,Calvyn82/xruby,alexbrinkman/xruby,darrencauthon/xruby,alexbrinkman/xruby,Insti/exercism-ruby,tommyschaefer/xruby,Calvyn82/word_count,kotp/xruby,kickinbahk/xruby,gchan/xruby,samilokan/xruby,dalexj/xruby,Calvyn82/xruby,wobh/xruby,samilokan/xruby,NeimadTL/ruby,dalexj/xruby,rashmiagar/exercism,exercism/xruby,gchan/xruby,NobbZ/xruby,wobh/xruby,jdsayle/xruby,Insti/exercism-ruby