chore(tests/lean/sig2): remove unnecessary parenthesis from test
chore(tests/lean/sig2): remove unnecessary parenthesis from test

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

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