Skip rubinius due to [Issue rubinius/rubinius#2247]

spec/commands/whereami_spec.rb

@@ -181,6 +181,8 @@ describe "whereami" do
         Object.remove_const(:Horse)
       end
 
+      # https://github.com/rubinius/rubinius/pull/2247
+      unless Pry::Helpers::BaseHelpers.rbx?
         it 'should show class when -c option used, and binding is outside a method' do
           class Cor
             def blimey;end
@@ -192,6 +194,7 @@ describe "whereami" do
           Object.remove_const(:Cor)
         end
       end
+    end
 
   it 'should not show line numbers or marker when -n switch is used' do
     class Cor