fix(frontends/lean/parser): copy rec and initial fields when processing Exprs and ScopedExpr
fix(frontends/lean/parser): copy rec and initial fields when processing Exprs and ScopedExpr

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

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