revises an example in docs about habtm & fixtures
revises an example in docs about habtm & fixtures

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