fix(emacs/lean-flycheck.el): use -concat in  lean-flycheck-command
fix(emacs/lean-flycheck.el): use -concat in  lean-flycheck-command

htzh/lean,sp3ctum/lean,leanprover/lean,leanprover/lean,rlewis1988/lean,fpvandoorn/lean,rlewis1988/lean,rlewis1988/lean,soonhokong/lean,Kha/lean,avigad/lean,eigengrau/lean,leanprover-community/lean,soonhokong/lean-windows,Kha/lean,UlrikBuchholtz/lean,johoelzl/lean,rlewis1988/lean,soonhokong/lean,johoelzl/lean,fpvandoorn/lean2,levnach/lean,dselsam/lean,fpvandoorn/lean,soonhokong/lean-windows,soonhokong/lean-osx,javra/lean,sp3ctum/lean,digama0/lean,leodemoura/lean,leodemoura/lean,fpvandoorn/lean2,eigengrau/lean,Kha/lean,fpvandoorn/lean,avigad/lean,soonhokong/lean,leodemoura/lean,leanprover-community/lean,levnach/lean,levnach/lean,htzh/lean,c-cube/lean,leanprover-community/lean,c-cube/lean,fgdorais/lean,fgdorais/lean,javra/lean,fgdorais/lean,sp3ctum/lean,soonhokong/lean,javra/lean,dselsam/lean,digama0/lean,fgdorais/lean,johoelzl/lean,soonhokong/lean-osx,levnach/lean,leodemoura/lean,c-cube/lean,UlrikBuchholtz/lean,leodemoura/lean,htzh/lean,soonhokong/lean-windows,sp3ctum/lean,soonhokong/lean-osx,johoelzl/lean,leanprover/lean,avigad/lean,UlrikBuchholtz/lean,htzh/lean,javra/lean,Kha/lean,leanprover/lean,dselsam/lean,fpvandoorn/lean2,leanprover-community/lean,eigengrau/lean,fpvandoorn/lean2,leanprover-community/lean,fpvandoorn/lean2,digama0/lean,leanprover-community/lean,dselsam/lean,digama0/lean,avigad/lean,eigengrau/lean,UlrikBuchholtz/lean,avigad/lean,javra/lean,soonhokong/lean-osx,Kha/lean,soonhokong/lean-windows,avigad/lean,soonhokong/lean-windows,digama0/lean,Kha/lean,UlrikBuchholtz/lean,sp3ctum/lean,fgdorais/lean,eigengrau/lean,soonhokong/lean-osx,soonhokong/lean,johoelzl/lean,fpvandoorn/lean,fpvandoorn/lean,c-cube/lean,leanprover/lean,fpvandoorn/lean,dselsam/lean,htzh/lean,rlewis1988/lean,rlewis1988/lean,fgdorais/lean,digama0/lean,dselsam/lean,johoelzl/lean,c-cube/lean,leanprover/lean,levnach/lean,leodemoura/lean