Make pep8 spawn/exec functions return same output
Make pep8 spawn/exec functions return same output

Also remove unneeded "self.result".

SG345/autopep8,hhatto/autopep8,SG345/autopep8,Vauxoo/autopep8,vauxoo-dev/autopep8,MeteorAdminz/autopep8,vauxoo-dev/autopep8,MeteorAdminz/autopep8,Vauxoo/autopep8,hhatto/autopep8