Use target language's document.yaml [ci skip]
Use target language's document.yaml [ci skip]

Let me build guide with "ko" language,
    
    Before:
    - It try to use guides/source/documents.yaml
    
    After:
    - It try to use guides/source/ko/documents.yaml
kirs/rails-1,kamipo/rails,aditya-kapoor/rails,koic/rails,yhirano55/rails,EmmaB/rails-1,bradleypriest/rails,joonyou/rails,Edouard-chin/rails,illacceptanything/illacceptanything,prathamesh-sonpatki/rails,fabianoleittes/rails,baerjam/rails,pvalena/rails,alecspopa/rails,tjschuck/rails,brchristian/rails,betesh/rails,vipulnsward/rails,travisofthenorth/rails,mechanicles/rails,hanystudy/rails,kaspth/rails,gfvcastro/rails,maicher/rails,tjschuck/rails,rails/rails,illacceptanything/illacceptanything,ledestin/rails,kmayer/rails,palkan/rails,pvalena/rails,mohitnatoo/rails,ngpestelos/rails,gcourtemanche/rails,iainbeeston/rails,lcreid/rails,jeremy/rails,illacceptanything/illacceptanything,mohitnatoo/rails,Vasfed/rails,untidy-hair/rails,odedniv/rails,prathamesh-sonpatki/rails,travisofthenorth/rails,tjschuck/rails,bogdanvlviv/rails,Vasfed/rails,tgxworld/rails,kirs/rails-1,lucasmazza/rails,notapatch/rails,deraru/rails,tgxworld/rails,shioyama/rails,lcreid/rails,mijoharas/rails,jeremy/rails,fabianoleittes/rails,Edouard-chin/rails,mathieujobin/reduced-rails-for-travis,yhirano55/rails,arunagw/rails,iainbeeston/rails,assain/rails,Sen-Zhang/rails,rafaelfranca/omg-rails,Erol/rails,jeremy/rails,deraru/rails,maicher/rails,vipulnsward/rails,printercu/rails,yhirano55/rails,yalab/rails,georgeclaghorn/rails,Envek/rails,aditya-kapoor/rails,aditya-kapoor/rails,xlymian/rails,bogdanvlviv/rails,bogdanvlviv/rails,illacceptanything/illacceptanything,schuetzm/rails,kddeisz/rails,yasslab/railsguides.jp,starknx/rails,georgeclaghorn/rails,ngpestelos/rails,illacceptanything/illacceptanything,lucasmazza/rails,eileencodes/rails,yahonda/rails,felipecvo/rails,prathamesh-sonpatki/rails,starknx/rails,pvalena/rails,alecspopa/rails,Sen-Zhang/rails,travisofthenorth/rails,untidy-hair/rails,schuetzm/rails,illacceptanything/illacceptanything,illacceptanything/illacceptanything,yalab/rails,fabianoleittes/rails,Erol/rails,georgeclaghorn/rails,utilum/rails,mohitnatoo/rails,pschambacher/rails,repinel/rails,untidy-hair/rails,mathieujobin/reduced-rails-for-travis,eileencodes/rails,Stellenticket/rails,notapatch/rails,gauravtiwari/rails,jeremy/rails,esparta/rails,kamipo/rails,matrinox/rails,esparta/rails,mijoharas/rails,joonyou/rails,EmmaB/rails-1,mechanicles/rails,betesh/rails,joonyou/rails,utilum/rails,flanger001/rails,mechanicles/rails,odedniv/rails,yahonda/rails,betesh/rails,BlakeWilliams/rails,yasslab/railsguides.jp,EmmaB/rails-1,ttanimichi/rails,xlymian/rails,arunagw/rails,repinel/rails,BlakeWilliams/rails,flanger001/rails,Erol/rails,xlymian/rails,pschambacher/rails,matrinox/rails,fabianoleittes/rails,repinel/rails,arunagw/rails,arunagw/rails,Stellenticket/rails,yahonda/rails,illacceptanything/illacceptanything,assain/rails,rails/rails,Envek/rails,palkan/rails,tjschuck/rails,notapatch/rails,illacceptanything/illacceptanything,shioyama/rails,Edouard-chin/rails,travisofthenorth/rails,lucasmazza/rails,illacceptanything/illacceptanything,Vasfed/rails,MSP-Greg/rails,odedniv/rails,brchristian/rails,Sen-Zhang/rails,bradleypriest/rails,eileencodes/rails,utilum/rails,Envek/rails,kmcphillips/rails,koic/rails,MSP-Greg/rails,Erol/rails,rafaelfranca/omg-rails,illacceptanything/illacceptanything,lcreid/rails,yhirano55/rails,Stellenticket/rails,gfvcastro/rails,yawboakye/rails,ngpestelos/rails,BlakeWilliams/rails,joonyou/rails,assain/rails,kmcphillips/rails,yahonda/rails,alecspopa/rails,kaspth/rails,kmayer/rails,yawboakye/rails,printercu/rails,koic/rails,tgxworld/rails,yawboakye/rails,ttanimichi/rails,illacceptanything/illacceptanything,hanystudy/rails,kddeisz/rails,kaspth/rails,mechanicles/rails,yasslab/railsguides.jp,gfvcastro/rails,starknx/rails,utilum/rails,felipecvo/rails,MSP-Greg/rails,esparta/rails,shioyama/rails,BlakeWilliams/rails,baerjam/rails,mohitnatoo/rails,yawboakye/rails,rafaelfranca/omg-rails,illacceptanything/illacceptanything,felipecvo/rails,Edouard-chin/rails,hanystudy/rails,aditya-kapoor/rails,esparta/rails,kddeisz/rails,gauravtiwari/rails,iainbeeston/rails,repinel/rails,kddeisz/rails,matrinox/rails,assain/rails,ledestin/rails,mathieujobin/reduced-rails-for-travis,kmayer/rails,illacceptanything/illacceptanything,yalab/rails,gcourtemanche/rails,schuetzm/rails,rails/rails,eileencodes/rails,pvalena/rails,untidy-hair/rails,vipulnsward/rails,shioyama/rails,vipulnsward/rails,brchristian/rails,ledestin/rails,betesh/rails,yalab/rails,prathamesh-sonpatki/rails,gfvcastro/rails,pschambacher/rails,Stellenticket/rails,notapatch/rails,maicher/rails,rails/rails,baerjam/rails,deraru/rails,kmcphillips/rails,kmcphillips/rails,bradleypriest/rails,kamipo/rails,yasslab/railsguides.jp,MSP-Greg/rails,flanger001/rails,deraru/rails,printercu/rails,gauravtiwari/rails,Envek/rails,flanger001/rails,georgeclaghorn/rails,mijoharas/rails,kirs/rails-1,palkan/rails,illacceptanything/illacceptanything,bogdanvlviv/rails,gcourtemanche/rails,tgxworld/rails,Vasfed/rails,baerjam/rails,palkan/rails,schuetzm/rails,iainbeeston/rails,lcreid/rails,printercu/rails,ttanimichi/rails