Additional test for ruby/queen-attack.
Additional test for ruby/queen-attack.

Also test diagonals slanted the other way.

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