t / chainlint / multi-line-nested-command-substitution.expecton commit revision: implement sparse algorithm (d5d2e93)
   1(
   2        foo &&
   3        x=$(
   4                echo bar |
   5                cat
   6>>      ) &&
   7        echo ok
   8>) |
   9sort &&
  10(
  11        bar &&
  12        x=$(echo bar |
  13                cat
  14>>      ) &&
  15        y=$(echo baz |
  16>>              fip) &&
  17        echo fail
  18>)