Fix typo and use a non-existent shell to ensure reproducability
Fix typo and use a non-existent shell to ensure reproducability

nobu/rubyspec,sgarciac/spec,ruby/spec,ruby/rubyspec,sgarciac/spec,ruby/spec,ruby/spec,eregon/rubyspec,sgarciac/spec,ruby/rubyspec,eregon/rubyspec,eregon/rubyspec,nobu/rubyspec,nobu/rubyspec