t / chainlint / command-substitution.expecton commit t3506: validate '-m 1 -ff' is now accepted for non-merge commits (1c32013)
   1(
   2        foo &&
   3        bar=$(gobble) &&
   4        baz
   5>) &&
   6(
   7?!AMP?! bar=$(gobble blocks)
   8        baz
   9>)