Fix a typo s/refering/referring/
Fix a typo s/refering/referring/

eregon/rubyspec,kachick/rubyspec,eregon/rubyspec,nobu/rubyspec,eregon/rubyspec,ruby/rubyspec,wied03/rubyspec,nobu/rubyspec,sgarciac/spec,wied03/rubyspec,ruby/rubyspec,kachick/rubyspec,sgarciac/spec,ruby/spec,ruby/spec,nobu/rubyspec,kachick/rubyspec,ruby/spec,wied03/rubyspec,sgarciac/spec