fix return 0 show error_box

test/miaou-bash.test.bash

@@ -119,6 +119,7 @@ TIMEFORMAT=$'\nelapsed: %Rs'
 time {
   assert success
   assert exit_0
+  assert return_conditional
   assert_grep success_with_args 'count args: 2' -- 'A B' C
 
   fail_type subshell_term SUBSHELL_ERROR

test/stub/scenario.bash

@@ -58,6 +58,15 @@ function do_return {
   should_return
 }
 
+function do_return_conditional {
+  if call_function_which_will_return; then
+    echo SHOULD NOT APPEAR
+  else
+    echo return is: $?
+  fi
+  echo SUCCESS
+}
+
 function do_unbound_associative {
   declare -A associative
   associative['A']='Abc'