add brackets around attribute_name
add brackets around attribute_name

since 'attr_name_will_change!' is not an actual method it should
be clearer that you have to insert the attribute name as in line 104

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