Add BasicObject#instance_eval example with negative line number
Add BasicObject#instance_eval example with negative line number

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