fix(frontends/lean/parser): bug in parse_double
fix(frontends/lean/parser): bug in parse_double

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