Example: fixes for String#oct specs.
Example: fixes for String#oct specs.

Notes:
* One facet of behavior per example.
* Use nested describes to organize and simplify the specs.
* Use appropriately specific spec description strings. For
  example, describe the error condition, specify the correct
  form of the input, add words that show the main distinction
  between different code examples. If there is no distinction,
  the examples should not be in different specs. It is fine
  to use more than one code example in an example block if the
  facet of behavior is the same. Use your judgment and ask
  questions if you are unsure.

benlovell/rubyspec,flavio/rubyspec,calavera/rubyspec,lucaspinto/rubyspec,metadave/rubyspec,jannishuebl/rubyspec,xaviershay/rubyspec,mrkn/rubyspec,griff/rubyspec,godfat/rubyspec,roshats/rubyspec,bjeanes/rubyspec,mbj/rubyspec,lucaspinto/rubyspec,enricosada/rubyspec,amarshall/rubyspec,undees/rubyspec,sgarciac/spec,metadave/rubyspec,iliabylich/rubyspec,oggy/rubyspec,markburns/rubyspec,no6v/rubyspec,rdp/rubyspec,askl56/rubyspec,Aesthetikx/rubyspec,freerange/rubyspec,JuanitoFatas/rubyspec,mrkn/rubyspec,sferik/rubyspec,undees/rubyspec,rkh/rubyspec,enricosada/rubyspec,yb66/rubyspec,Zoxc/rubyspec,bomatson/rubyspec,alexch/rubyspec,wied03/rubyspec,sgarciac/spec,kachick/rubyspec,kachick/rubyspec,qmx/rubyspec,DavidEGrayson/rubyspec,alex/rubyspec,mbj/rubyspec,iainbeeston/rubyspec,josedonizetti/rubyspec,rkh/rubyspec,sgarciac/spec,atambo/rubyspec,yous/rubyspec,alex/rubyspec,atambo/rubyspec,jabley/rubyspec,agrimm/rubyspec,calavera/rubyspec,ruby/spec,teleological/rubyspec,wied03/rubyspec,teleological/rubyspec,yous/rubyspec,jvshahid/rubyspec,nevir/rubyspec,shirosaki/rubyspec,jannishuebl/rubyspec,no6v/rubyspec,ericmeyer/rubyspec,eregon/rubyspec,tinco/rubyspec,marcandre/rubyspec,timfel/rubyspec,BanzaiMan/rubyspec,eregon/rubyspec,shirosaki/rubyspec,nobu/rubyspec,yaauie/rubyspec,markburns/rubyspec,qmx/rubyspec,sorah/rubyspec,roshats/rubyspec,chesterbr/rubyspec,marcandre/rubyspec,nevir/rubyspec,bomatson/rubyspec,flavio/rubyspec,jstepien/rubyspec,ruby/rubyspec,sorah/rubyspec,neomadara/rubyspec,MagLev/rubyspec,iainbeeston/rubyspec,DawidJanczak/rubyspec,alindeman/rubyspec,bl4ckdu5t/rubyspec,yb66/rubyspec,saturnflyer/rubyspec,rdp/rubyspec,iliabylich/rubyspec,agrimm/rubyspec,kidaa/rubyspec,wied03/rubyspec,ruby/spec,oggy/rubyspec,JuanitoFatas/rubyspec,Aesthetikx/rubyspec,sferik/rubyspec,yaauie/rubyspec,ruby/spec,scooter-dangle/rubyspec,ruby/rubyspec,nobu/rubyspec,MagLev/rubyspec,bjeanes/rubyspec,DavidEGrayson/rubyspec,eregon/rubyspec,benburkert/rubyspec,askl56/rubyspec,ericmeyer/rubyspec,benlovell/rubyspec,freerange/rubyspec,alindeman/rubyspec,scooter-dangle/rubyspec,Zoxc/rubyspec,timfel/rubyspec,neomadara/rubyspec,terceiro/rubyspec,jvshahid/rubyspec,xaviershay/rubyspec,godfat/rubyspec,amarshall/rubyspec,saturnflyer/rubyspec,kachick/rubyspec,tinco/rubyspec,kidaa/rubyspec,josedonizetti/rubyspec,BanzaiMan/rubyspec,terceiro/rubyspec,griff/rubyspec,julik/rubyspec,julik/rubyspec,nobu/rubyspec,bl4ckdu5t/rubyspec,benburkert/rubyspec,chesterbr/rubyspec,jstepien/rubyspec,DawidJanczak/rubyspec,alexch/rubyspec,jabley/rubyspec