Fix mode of oracle_spec.rb
Fix mode of oracle_spec.rb

This was (unitentionally?) changed in a previous pull request,
and I didn't catch it when I merged.

nicohvi/sequel,nju520/sequel,davidbegin/sequel,knut2/sequel,offshore-safety/sequel,pfarrell/sequel,pfarrell/sequel,dennis-d/custom_sequel,Marketcircle/sequel,uhoh-itsmaciek/sequel,dennis-d/custom_sequel,knut2/sequel,t-morgan/sequel,uhoh-itsmaciek/sequel,offshore-safety/sequel,reubano/sequel,freshpay/sequel,t-morgan/sequel,mpalmer/sequel,gferguson-gd/sequel,nju520/sequel,gferguson-gd/sequel,nicohvi/sequel,yazshel/sequel,davidbegin/sequel,beni55/sequel,seeARMS/sequel,reubano/sequel,beni55/sequel,chef/sequel,seeARMS/sequel,freshpay/sequel,yazshel/sequel,mpalmer/sequel,offshore-safety/sequel