Fix SyntaxError in guides sample code
Fix SyntaxError in guides sample code

[ci skip]

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