update: untap/retap formulae before/after pull.
update: untap/retap formulae before/after pull.

This should fix problems like Homebrew/homebrew#19799 where we pull formulae from taps
into core. I want to get something similar merged ASAP so we can pull
GCC into core (see Homebrew/homebrew#20678).

Closes Homebrew/homebrew#19799.

JCount/brew,ilovezfs/brew,Linuxbrew/brew,zmwangx/brew,nandub/brew,Linuxbrew/brew,nandub/brew,AnastasiaSulyagina/brew,vitorgalvao/brew,JCount/brew,amar-laksh/brew_sudo,hanxue/linuxbrew,mistydemeo/homebrew,tonyg/homebrew,EricFromCanada/brew,aw1621107/brew,DomT4/brew,mgrimes/brew,bfontaine/brew,toonetown/homebrew,claui/brew,gordonmcshane/homebrew,muellermartin/dist,muellermartin/dist,vitorgalvao/brew,maxim-belkin/brew,amar-laksh/brew_sudo,sjackman/homebrew,sjackman/homebrew,vitorgalvao/brew,gregory-nisbet/brew,staticfloat/brew,MikeMcQuaid/brew,vitorgalvao/brew,jmsundar/brew,mahori/brew,Homebrew/brew,claui/brew,palxex/brew,amar-laksh/brew_sudo,reelsense/brew,toonetown/homebrew,alyssais/brew,nandub/brew,pseudocody/brew,reitermarkus/brew,reitermarkus/brew,reelsense/brew,mgrimes/brew,reitermarkus/brew,konqui/brew,mahori/brew,reitermarkus/brew,claui/brew,Linuxbrew/brew,pseudocody/brew,mahori/brew,tonyg/homebrew,gordonmcshane/homebrew,aw1621107/brew,Homebrew/brew,MikeMcQuaid/brew,bfontaine/brew,EricFromCanada/brew,MikeMcQuaid/brew,konqui/brew,palxex/brew,JCount/brew,tonyg/homebrew,JCount/brew,alyssais/brew,ilovezfs/brew,palxex/brew,ilovezfs/brew,sjackman/homebrew,Linuxbrew/brew,mistydemeo/homebrew,mgrimes/brew,gregory-nisbet/brew,DomT4/brew,Homebrew/brew,maxim-belkin/brew,AnastasiaSulyagina/brew,pseudocody/brew,hanxue/linuxbrew,claui/brew,AnastasiaSulyagina/brew,konqui/brew,DomT4/brew,EricFromCanada/brew,toonetown/homebrew,staticfloat/brew,rwhogg/brew,mistydemeo/homebrew,zmwangx/brew,bfontaine/brew,MikeMcQuaid/brew,staticfloat/brew,aw1621107/brew,reelsense/brew,jmsundar/brew,EricFromCanada/brew,muellermartin/dist,nandub/brew,jmsundar/brew,alyssais/brew,gregory-nisbet/brew,gordonmcshane/homebrew,DomT4/brew,rwhogg/brew,maxim-belkin/brew,rwhogg/brew,sjackman/homebrew,hanxue/linuxbrew,Homebrew/brew,mahori/brew,zmwangx/brew,konqui/brew