PASS PASS + Cont(ains balanced( nested Br(ack)ets )in t)he text
          - Con(tains i(mbalan(ced Br(ack)ets, )one c)lose missing
          - Contains i(mbalan(ced Br(ack)ets, )one op)en m)missing
PASS PASS + No brackets in this string
          - Won)ky br(ackets in) this s(tring
          - More wonky br(ackets in) th)is s(tring
          - Just the one( leading bracket
          - And just th)e one trailing bracket
PASS PASS + So(me m(ultip)le n(est(s in) thi)s o)ne
PASS PASS + Ther(e is( mo(re) de(e)p )nes(ti(n(g i)n (mul)ti)p(l)es) he)re
PASS PASS + Some d((oub)le b)rackets
PASS PASS + ab(())cde
PASS PASS + ab()()cde
          - ab(c(d)e
          - ab(c)d)e