### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
t4 ... failed
  % 'btest-diff output' failed unexpectedly (exit code 1)
  % cat .diag
  == File ===============================
  4
  == Diff ===============================
  @@ -1 +1 @@
  -XXX
  +4
  =======================================

  % cat .stderr