fix(replace_using_ctx_fn): typo
fix(replace_using_ctx_fn): typo

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

soonhokong/lean-windows,fgdorais/lean,levnach/lean,dselsam/lean,dselsam/lean,soonhokong/lean-osx,codyroux/lean0.1,rlewis1988/lean,digama0/lean,soonhokong/lean-windows,soonhokong/lean-osx,codyroux/lean0.1,leanprover-community/lean,avigad/lean,c-cube/lean,javra/lean,codyroux/lean0.1,digama0/lean,Kha/lean,javra/lean,fpvandoorn/lean2,leanprover-community/lean,sp3ctum/lean,fgdorais/lean,soonhokong/travis_test,rlewis1988/lean,fpvandoorn/lean,leanprover/lean,digama0/lean,fpvandoorn/lean,soonhokong/lean,fpvandoorn/lean2,avigad/lean,soonhokong/lean-windows,dselsam/lean,c-cube/lean,leodemoura/lean,soonhokong/lean,fpvandoorn/lean2,leanprover/lean,soonhokong/lean-windows,soonhokong/lean-windows,leanprover/lean,rlewis1988/lean,Kha/lean,levnach/lean,fpvandoorn/lean,digama0/lean,htzh/lean,digama0/lean,avigad/lean,soonhokong/lean,rlewis1988/lean,leanprover-community/lean,johoelzl/lean,soonhokong/lean-osx,leodemoura/lean,johoelzl/lean,leanprover-community/lean,fgdorais/lean,UlrikBuchholtz/lean,fpvandoorn/lean,eigengrau/lean,fgdorais/lean,sp3ctum/lean,leanprover-community/lean,sp3ctum/lean,htzh/lean,Kha/lean,fgdorais/lean,soonhokong/lean-osx,digama0/lean,htzh/lean,htzh/lean,levnach/lean,eigengrau/lean,UlrikBuchholtz/lean,leodemoura/lean,rlewis1988/lean,UlrikBuchholtz/lean,leanprover/lean,sp3ctum/lean,c-cube/lean,javra/lean,eigengrau/lean,fpvandoorn/lean,johoelzl/lean,dselsam/lean,eigengrau/lean,UlrikBuchholtz/lean,dselsam/lean,dselsam/lean,codyroux/lean0.1,soonhokong/lean,UlrikBuchholtz/lean,leodemoura/lean,javra/lean,c-cube/lean,javra/lean,avigad/lean,leanprover-community/lean,leodemoura/lean,soonhokong/lean,fgdorais/lean,Kha/lean,leanprover/lean,soonhokong/lean-osx,soonhokong/travis_test,rlewis1988/lean,soonhokong/travis_test,fpvandoorn/lean2,c-cube/lean,johoelzl/lean,eigengrau/lean,levnach/lean,sp3ctum/lean,htzh/lean,avigad/lean,johoelzl/lean,leanprover/lean,levnach/lean,Kha/lean,fpvandoorn/lean,Kha/lean,leodemoura/lean,avigad/lean,fpvandoorn/lean2,soonhokong/travis_test,johoelzl/lean