[hack] Saved state code should allow for empty revision string
[hack] Saved state code should allow for empty revision string

Reviewed By: @dlreeves

Differential Revision: D2382407

jeffmo/flow,claudiopro/flow,shiftcars/flow,mroch/flow,dv/flow,JonathanUsername/flow,d14b3l/flow,TiddoLangerak/flow,samwgoldman/flow,Fresheyeball/flow,jgrund/flow,danvk/flow,ylu1317/flow,graue/flow,jgrund/flow,fletcherw/flow,cesarandreu/flow,d14b3l/flow,graue/flow,jamesgpearce/flow,CJstar/flow,nmote/flow,asivitz/flow,chenglou/flow,mcanthony/flow-type,Eyyub/flow,MichaelDeBoey/flow,samwgoldman/flow,jdelStrother/flow,mroch/flow,ylu1317/flow,popham/flow,AprilArcus/flow,danvk/flow,OCamlPro/flow,danvk/flow,facebook/flow,AgentME/flow,jamesgpearce/flow,gabro/flow,Eyyub/flow,dv/flow,darioajr/flow,popham/flow,fletcherw/flow,samwgoldman/flow,AprilArcus/flow,ForbesLindesay/flow,claudiopro/flow,danvk/flow,KevinTCoughlin/flow,darioajr/flow,OCamlPro/flow,dv/flow,JonathanUsername/flow,nmote/flow,facebook/flow,AprilArcus/flow,Drooids/flow,JonathanUsername/flow,Wanderfalke/flow,OCamlPro/flow,gabelevi/flow,jeffmo/flow,graue/flow,claudiopro/flow,CJstar/flow,samwgoldman/flow,mroch/flow,jdelStrother/flow,Eyyub/flow,MichaelDeBoey/flow,jamesgpearce/flow,cesarandreu/flow,Fresheyeball/flow,jgrund/flow,jamesgpearce/flow,siddhartharay007/flow,ForbesLindesay/flow,CJstar/flow,mroch/flow,gabelevi/flow,claudiopro/flow,paulshen/flow,popham/flow,ForbesLindesay/flow,shiftcars/flow,shiftcars/flow,jeffmo/flow,jamesgpearce/flow,AgentME/flow,siddhartharay007/flow,d14b3l/flow,Wanderfalke/flow,Wanderfalke/flow,fletcherw/flow,MichaelDeBoey/flow,facebook/flow,jeffutter/flow,graue/flow,mroch/flow,samwgoldman/flow,KevinTCoughlin/flow,AgentME/flow,chenglou/flow,jdelStrother/flow,AprilArcus/flow,TiddoLangerak/flow,JohnyDays/flow,Fresheyeball/flow,d14b3l/flow,d14b3l/flow,asivitz/flow,asivitz/flow,gabelevi/flow,JohnyDays/flow,darioajr/flow,nmote/flow,claudiopro/flow,samwgoldman/flow,facebook/flow,gabelevi/flow,jdelStrother/flow,KevinTCoughlin/flow,chenglou/flow,nmote/flow,jdelStrother/flow,ForbesLindesay/flow,ForbesLindesay/flow,MichaelDeBoey/flow,jdelStrother/flow,ylu1317/flow,JonathanUsername/flow,ForbesLindesay/flow,mroch/flow,CJstar/flow,mcanthony/flow-type,ylu1317/flow,siddhartharay007/flow,OCamlPro/flow,Drooids/flow,shiftcars/flow,Fresheyeball/flow,gabelevi/flow,cesarandreu/flow,jeffmo/flow,chenglou/flow,jgrund/flow,Eyyub/flow,jeffmo/flow,popham/flow,gabro/flow,shiftcars/flow,fletcherw/flow,JonathanUsername/flow,chenglou/flow,jamesgpearce/flow,jgrund/flow,JohnyDays/flow,AprilArcus/flow,JonathanUsername/flow,gabelevi/flow,nmote/flow,KevinTCoughlin/flow,paulshen/flow,d14b3l/flow,AprilArcus/flow,paulshen/flow,darioajr/flow,Drooids/flow,jeffutter/flow,ylu1317/flow,TiddoLangerak/flow,gabro/flow,mcanthony/flow-type,samwgoldman/flow,facebook/flow,popham/flow,siddhartharay007/flow,mroch/flow,fletcherw/flow,paulshen/flow,jeffutter/flow,jgrund/flow,dv/flow,gabro/flow,asivitz/flow,graue/flow,nmote/flow,cesarandreu/flow,popham/flow,JonathanUsername/flow,Drooids/flow,popham/flow,gabro/flow,facebook/flow,jamesgpearce/flow,Wanderfalke/flow,TiddoLangerak/flow,JohnyDays/flow,graue/flow,gabelevi/flow,jeffutter/flow,AgentME/flow,gabro/flow,AgentME/flow,mcanthony/flow-type,nmote/flow,jeffmo/flow,MichaelDeBoey/flow,TiddoLangerak/flow,shiftcars/flow,facebook/flow,chenglou/flow,fletcherw/flow