pull: skip non-ruby files when collecting formulae names
pull: skip non-ruby files when collecting formulae names

Closes #377.

Signed-off-by: Baptiste Fontaine <e9d71f5ee7c92d6dc9e92ffdad17b8bd49418f98@ptistefontaine.fr>

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