Added more tests for CollectionTrait::append
Added more tests for CollectionTrait::append

mvdriel/cakephp,jeffblack360/cakephp,adopico/cakephp,CVO-Technologies/cakephp,yinhe007/cakephp,michaelze/cakephp,nrother/cakephp,dakota/cakephp,bravo-kernel/cakephp,khoimt/cakephp-study,CVO-Technologies/cakephp,jerems02/cakephp,web-player/cakephp,thinkingmedia/cakephp,burriko/cakephp,Balachan27/cakephp,nrother/cakephp,burriko/cakephp,kumamidori/cakephp,bravo-kernel/cakephp,dakota/cakephp,jjj117/cakephp,michaelze/cakephp,yinhe007/cakephp,justinyost/cakephp,erikfig/cakephp,davidyell/cakephp,eboominathan/cakephp,khoimt/cakephp-study,petteyg/cakephp,web-player/cakephp,ADmad/cakephp,jeffblack360/cakephp,eryw/cakephp,tgr0ss/cakephp,ionas/cakephp,davidyell/cakephp,CVO-Technologies/cakephp,adopico/cakephp,tisu2tisu/cakephp,ionas/cakephp,eryw/cakephp,eboominathan/cakephp,Balachan27/cakephp,jjj117/cakephp,eryw/cakephp,cakephp-fr/cakephp,CakeDC/cakephp,gmponos/cakephp,justinyost/cakephp,dkarvounaris/cakephp,pbaire/cakephp,justinyost/cakephp,mvdriel/cakephp,elboletaire/cakephp,ADmad/cakephp,HavokInspiration/cakephp,thinkingmedia/cakephp,Phillaf/cakephp,HavokInspiration/cakephp,elboletaire/cakephp,ndm2/cakephp,jerems02/cakephp,ndm2/cakephp,tenkoma/cakephp,akintoey/cakephp,adopico/cakephp,dkarvounaris/cakephp,jeffblack360/cakephp,tisu2tisu/cakephp,tgr0ss/cakephp,kumamidori/cakephp,nrother/cakephp,CakeDC/cakephp,dkarvounaris/cakephp,cakephp/cakephp,tgr0ss/cakephp,mvdriel/cakephp,berrygoudswaard/cakephp,yinhe007/cakephp,web-player/cakephp,erikfig/cakephp,garethellis36/cakephp,cakephp/cakephp,ADmad/cakephp,ndm2/cakephp,CakeDC/cakephp,jjj117/cakephp,garethellis36/cakephp,Phillaf/cakephp,pbaire/cakephp,garethellis36/cakephp,thinkingmedia/cakephp,timhoeppner/cakephp,michaelze/cakephp,berrygoudswaard/cakephp,HavokInspiration/cakephp,petteyg/cakephp,mvdriel/cakephp,burriko/cakephp,ADmad/cakephp,khoimt/cakephp-study,garethellis36/cakephp,cakephp/cakephp,ndm2/cakephp,timhoeppner/cakephp,gmponos/cakephp,davidyell/cakephp,jerems02/cakephp,timhoeppner/cakephp,petteyg/cakephp,tenkoma/cakephp,cakephp/cakephp,elboletaire/cakephp,tenkoma/cakephp,gmponos/cakephp,akintoey/cakephp,pbaire/cakephp,berrygoudswaard/cakephp,Phillaf/cakephp,petteyg/cakephp,CakeDC/cakephp,tenkoma/cakephp,kumamidori/cakephp,bravo-kernel/cakephp,dakota/cakephp,Balachan27/cakephp,akintoey/cakephp,tisu2tisu/cakephp,erikfig/cakephp,cakephp-fr/cakephp,cakephp-fr/cakephp,eboominathan/cakephp,dakota/cakephp,ionas/cakephp