Update guides to mention 3.2.18.
Update guides to mention 3.2.18.

And reword things a little to mention the specific patch release less.

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