Revert "Revert "update doc, assert_template also accepts false""
Revert "Revert "update doc, assert_template also accepts false""

Reason: docrails policy is very strict about code. No matter how
innocent the change, if it is not documentation it needs to go
through a PR to rails/rails.

Plase see the warning box at the bottom of

    http://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html#contributing-to-the-rails-documentation

This reverts commit e1c5d24369440857de1402d61c85d982b29d8019.

vassilevsky/rails,Sen-Zhang/rails,aditya-kapoor/rails,georgeclaghorn/rails,Spin42/rails,elfassy/rails,yhirano55/rails,kenta-s/rails,bradleypriest/rails,kmcphillips/rails,eileencodes/rails,MichaelSp/rails,schuetzm/rails,gfvcastro/rails,yalab/rails,georgeclaghorn/rails,bogdanvlviv/rails,rafaelfranca/omg-rails,mathieujobin/reduced-rails-for-travis,kamipo/rails,schuetzm/rails,rbhitchcock/rails,Vasfed/rails,amoody2108/TechForJustice,repinel/rails,gfvcastro/rails,rafaelfranca/omg-rails,arunagw/rails,mohitnatoo/rails,ledestin/rails,tijwelch/rails,iainbeeston/rails,joonyou/rails,mechanicles/rails,ngpestelos/rails,travisofthenorth/rails,baerjam/rails,88rabbit/newRails,illacceptanything/illacceptanything,felipecvo/rails,gcourtemanche/rails,felipecvo/rails,pvalena/rails,kmayer/rails,kamipo/rails,rossta/rails,Vasfed/rails,notapatch/rails,yalab/rails,flanger001/rails,untidy-hair/rails,kddeisz/rails,yhirano55/rails,kaspth/rails,printercu/rails,illacceptanything/illacceptanything,coreyward/rails,mechanicles/rails,illacceptanything/illacceptanything,alecspopa/rails,Edouard-chin/rails,brchristian/rails,kamipo/rails,samphilipd/rails,mechanicles/rails,lucasmazza/rails,utilum/rails,felipecvo/rails,MSP-Greg/rails,Envek/rails,fabianoleittes/rails,illacceptanything/illacceptanything,odedniv/rails,riseshia/railsguides.kr,joonyou/rails,alecspopa/rails,sealocal/rails,mtsmfm/rails,pvalena/rails,bogdanvlviv/rails,tgxworld/rails,kddeisz/rails,lcreid/rails,yawboakye/rails,bolek/rails,88rabbit/newRails,sealocal/rails,Stellenticket/rails,amoody2108/TechForJustice,starknx/rails,mijoharas/rails,kirs/rails-1,jeremy/rails,assain/rails,gfvcastro/rails,baerjam/rails,yahonda/rails,Vasfed/rails,Stellenticket/rails,utilum/rails,vassilevsky/rails,joonyou/rails,samphilipd/rails,hanystudy/rails,palkan/rails,ttanimichi/rails,pschambacher/rails,shioyama/rails,lucasmazza/rails,koic/rails,utilum/rails,BlakeWilliams/rails,illacceptanything/illacceptanything,arunagw/rails,rails/rails,repinel/rails,BlakeWilliams/rails,untidy-hair/rails,notapatch/rails,koic/rails,kmayer/rails,mtsmfm/rails,stefanmb/rails,assain/rails,kachick/rails,mtsmfm/rails,yasslab/railsguides.jp,marklocklear/rails,prathamesh-sonpatki/rails,rails/rails,yawboakye/rails,betesh/rails,schuetzm/rails,yasslab/railsguides.jp,starknx/rails,esparta/rails,bogdanvlviv/rails,prathamesh-sonpatki/rails,mathieujobin/reduced-rails-for-travis,tijwelch/rails,richseviora/rails,vipulnsward/rails,tgxworld/rails,sergey-alekseev/rails,gavingmiller/rails,voray/rails,gauravtiwari/rails,kenta-s/rails,voray/rails,coreyward/rails,sealocal/rails,xlymian/rails,coreyward/rails,arjes/rails,palkan/rails,Sen-Zhang/rails,kachick/rails,yalab/rails,Envek/rails,kddeisz/rails,hanystudy/rails,tjschuck/rails,MichaelSp/rails,notapatch/rails,Sen-Zhang/rails,Erol/rails,yawboakye/rails,esparta/rails,sergey-alekseev/rails,Envek/rails,mijoharas/rails,printercu/rails,eileencodes/rails,printercu/rails,untidy-hair/rails,kaspth/rails,kddeisz/rails,illacceptanything/illacceptanything,voray/rails,illacceptanything/illacceptanything,yhirano55/rails,MSP-Greg/rails,illacceptanything/illacceptanything,rbhitchcock/rails,EmmaB/rails-1,bradleypriest/rails,amoody2108/TechForJustice,sergey-alekseev/rails,mtsmfm/railstest,richseviora/rails,notapatch/rails,88rabbit/newRails,ledestin/rails,prathamesh-sonpatki/rails,arjes/rails,esparta/rails,stefanmb/rails,richseviora/rails,illacceptanything/illacceptanything,illacceptanything/illacceptanything,Erol/rails,illacceptanything/illacceptanything,tjschuck/rails,aditya-kapoor/rails,illacceptanything/illacceptanything,baerjam/rails,Edouard-chin/rails,kirs/rails-1,odedniv/rails,Stellenticket/rails,mohitnatoo/rails,travisofthenorth/rails,prathamesh-sonpatki/rails,brchristian/rails,EmmaB/rails-1,betesh/rails,MSP-Greg/rails,rails/rails,jeremy/rails,flanger001/rails,yahonda/rails,assain/rails,gcourtemanche/rails,maicher/rails,utilum/rails,Spin42/rails,gavingmiller/rails,riseshia/railsguides.kr,BlakeWilliams/rails,gavingmiller/rails,mechanicles/rails,kaspth/rails,yhirano55/rails,repinel/rails,yasslab/railsguides.jp,xlymian/rails,mohitnatoo/rails,bradleypriest/rails,deraru/rails,deraru/rails,lucasmazza/rails,BlakeWilliams/rails,Stellenticket/rails,matrinox/rails,fabianoleittes/rails,pschambacher/rails,travisofthenorth/rails,shioyama/rails,flanger001/rails,deraru/rails,ledestin/rails,marklocklear/rails,illacceptanything/illacceptanything,rbhitchcock/rails,lcreid/rails,maicher/rails,rossta/rails,flanger001/rails,mijoharas/rails,matrinox/rails,shioyama/rails,esparta/rails,eileencodes/rails,mtsmfm/railstest,rossta/rails,vipulnsward/rails,maicher/rails,aditya-kapoor/rails,Edouard-chin/rails,georgeclaghorn/rails,rafaelfranca/omg-rails,bolek/rails,Vasfed/rails,gcourtemanche/rails,tjschuck/rails,aditya-kapoor/rails,kachick/rails,pvalena/rails,mathieujobin/reduced-rails-for-travis,mtsmfm/railstest,hanystudy/rails,yahonda/rails,odedniv/rails,MichaelSp/rails,Erol/rails,assain/rails,untidy-hair/rails,ngpestelos/rails,repinel/rails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