Revert "Mercurial - use post-fix if"
Revert "Mercurial - use post-fix if"

This reverts commit 6a8b3cc71feccbf73225bc7dc8c5e6972de9953d.

This was a bad merge on my part.

Fixes Homebrew/homebrew#221. Fixes Homebrew/homebrew#220.

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