Add docs to ActiveRecord::Persistence#belongs_to_touch_method
Add docs to ActiveRecord::Persistence#belongs_to_touch_method

[ci skip]

yalab/rails,EmmaB/rails-1,MSP-Greg/rails,prathamesh-sonpatki/rails,schuetzm/rails,lcreid/rails,Edouard-chin/rails,yalab/rails,fabianoleittes/rails,rafaelfranca/omg-rails,palkan/rails,kmcphillips/rails,jeremy/rails,yawboakye/rails,yawboakye/rails,yhirano55/rails,jeremy/rails,kddeisz/rails,joonyou/rails,Envek/rails,tgxworld/rails,yahonda/rails,iainbeeston/rails,BlakeWilliams/rails,Envek/rails,tjschuck/rails,lcreid/rails,starknx/rails,rails/rails,lcreid/rails,tgxworld/rails,Envek/rails,Vasfed/rails,arunagw/rails,bogdanvlviv/rails,gauravtiwari/rails,fabianoleittes/rails,betesh/rails,jeremy/rails,utilum/rails,Erol/rails,bogdanvlviv/rails,flanger001/rails,yawboakye/rails,vipulnsward/rails,Erol/rails,yahonda/rails,rafaelfranca/omg-rails,palkan/rails,Stellenticket/rails,joonyou/rails,Edouard-chin/rails,kddeisz/rails,Erol/rails,Erol/rails,utilum/rails,EmmaB/rails-1,shioyama/rails,tgxworld/rails,EmmaB/rails-1,tgxworld/rails,vipulnsward/rails,joonyou/rails,eileencodes/rails,prathamesh-sonpatki/rails,flanger001/rails,georgeclaghorn/rails,shioyama/rails,arunagw/rails,yahonda/rails,esparta/rails,bogdanvlviv/rails,georgeclaghorn/rails,repinel/rails,gauravtiwari/rails,Vasfed/rails,vipulnsward/rails,mechanicles/rails,gauravtiwari/rails,kddeisz/rails,yhirano55/rails,Stellenticket/rails,georgeclaghorn/rails,iainbeeston/rails,esparta/rails,repinel/rails,Vasfed/rails,palkan/rails,notapatch/rails,vipulnsward/rails,mechanicles/rails,Stellenticket/rails,MSP-Greg/rails,tjschuck/rails,betesh/rails,mechanicles/rails,Envek/rails,repinel/rails,starknx/rails,fabianoleittes/rails,kmcphillips/rails,MSP-Greg/rails,utilum/rails,esparta/rails,schuetzm/rails,mechanicles/rails,notapatch/rails,esparta/rails,Vasfed/rails,BlakeWilliams/rails,iainbeeston/rails,yalab/rails,rafaelfranca/omg-rails,arunagw/rails,fabianoleittes/rails,BlakeWilliams/rails,yhirano55/rails,palkan/rails,Edouard-chin/rails,eileencodes/rails,eileencodes/rails,yawboakye/rails,joonyou/rails,rails/rails,rails/rails,lcreid/rails,notapatch/rails,starknx/rails,prathamesh-sonpatki/rails,Stellenticket/rails,tjschuck/rails,MSP-Greg/rails,flanger001/rails,shioyama/rails,iainbeeston/rails,kddeisz/rails,eileencodes/rails,arunagw/rails,BlakeWilliams/rails,bogdanvlviv/rails,georgeclaghorn/rails,kmcphillips/rails,betesh/rails,schuetzm/rails,schuetzm/rails,rails/rails,shioyama/rails,yhirano55/rails,kmcphillips/rails,tjschuck/rails,prathamesh-sonpatki/rails,yahonda/rails,betesh/rails,yalab/rails,Edouard-chin/rails,flanger001/rails,utilum/rails,repinel/rails,jeremy/rails,notapatch/rails