Document the return value of AR::Base#delete_all.
Document the return value of AR::Base#delete_all.

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