Add flake8 to requirements, for testing
Add flake8 to requirements, for testing

justinkinney/mkdocs,gregelin/mkdocs,ericholscher/mkdocs,michaelmcandrew/mkdocs,davidgillies/mkdocs,ramramps/mkdocs,mkdocs/mkdocs,kubikusrubikus/mkdocs,longjl/mkdocs,lbenet/mkdocs,cazzerson/mkdocs,jamesbeebop/mkdocs,wenqiuhua/mkdocs,samuelcolvin/mkdocs,wenqiuhua/mkdocs,williamjmorenor/mkdocs,d0ugal/mkdocs,vi4m/mkdocs,lukfor/mkdocs,samuelcolvin/mkdocs,simonfork/mkdocs,jamesbeebop/mkdocs,hhg2288/mkdocs,rickpeters/mkdocs,pjbull/mkdocs,fujita-shintaro/mkdocs,fujita-shintaro/mkdocs,hhg2288/mkdocs,jimporter/mkdocs,cnbin/mkdocs,ramramps/mkdocs,pjbull/mkdocs,peter1000/mkdocs,cnbin/mkdocs,fujita-shintaro/mkdocs,lbenet/mkdocs,waylan/mkdocs,samhatfield/mkdocs,longjl/mkdocs,williamjmorenor/mkdocs,gregelin/mkdocs,jpush/mkdocs,longjl/mkdocs,xeechou/mkblogs,xeechou/mkblogs,samhatfield/mkdocs,jpush/mkdocs,kubikusrubikus/mkdocs,wenqiuhua/mkdocs,williamjmorenor/mkdocs,hhg2288/mkdocs,michaelmcandrew/mkdocs,jeoygin/mkdocs,davidgillies/mkdocs,samuelcolvin/mkdocs,jeoygin/mkdocs,simonfork/mkdocs,jamesbeebop/mkdocs,jpush/mkdocs,michaelmcandrew/mkdocs,justinkinney/mkdocs,ericholscher/mkdocs,wenqiuhua/mkdocs,peter1000/mkdocs,dmehra/mkdocs,dmehra/mkdocs,cazzerson/mkdocs,davidgillies/mkdocs,jeoygin/mkdocs,ericholscher/mkdocs,simonfork/mkdocs,mkdocs/mkdocs,justinkinney/mkdocs,xeechou/mkblogs,waylan/mkdocs,ramramps/mkdocs,d0ugal/mkdocs,tedmiston/mkdocs,gregelin/mkdocs,lukfor/mkdocs,jimporter/mkdocs,samhatfield/mkdocs,mlzummo/mkdocs,rickpeters/mkdocs,vi4m/mkdocs,tedmiston/mkdocs,nicoddemus/mkdocs,cazzerson/mkdocs,waylan/mkdocs,rickpeters/mkdocs,pjbull/mkdocs,nicoddemus/mkdocs,dmehra/mkdocs,jimporter/mkdocs,peter1000/mkdocs,tedmiston/mkdocs,kubikusrubikus/mkdocs,cnbin/mkdocs,d0ugal/mkdocs,mlzummo/mkdocs,lbenet/mkdocs,vi4m/mkdocs,nicoddemus/mkdocs,mkdocs/mkdocs,lukfor/mkdocs,xeechou/mkblogs,mlzummo/mkdocs,cazzerson/mkdocs,jpush/mkdocs