Merge #6670: test: fix feature_pruning.py

db96c92 test: fix `feature_pruning.py` (UdjinM6)

Pull request description:

  ## Issue being fixed or feature implemented
  `feature_pruning.py` is broken atm. We don't run it in CI so the issue wasn't noticed in time.

  ## What was done?

  ## How Has This Been Tested?
  run `feature_pruning.py`

  ## Breaking Changes
  n/a

  ## Checklist:
  - [ ] I have performed a self-review of my own code
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [ ] I have assigned this pull request to a milestone _(for repository code-owners and collaborators only)_

ACKs for top commit:
  PastaPastaPasta:
    utACK db96c92

Tree-SHA512: df0328a0bb08ed953c57e39c10648020a179c22c254e2d2edff44388fe31ff4053f5c4a61429aac30093754febe3c883086560fb3b66d0d9e390d1a1d7138b97

Author: PastaPastaPasta

test/functional/feature_pruning.py

@@ -136,7 +136,7 @@ def create_big_chain(self):
         self.sync_blocks(self.nodes[0:5])
 
     def test_invalid_command_line_options(self):
-        self.stop_node(0)
+        self.stop_node(0, expected_stderr=EXPECTED_STDERR_NO_GOV_PRUNE)
         self.nodes[0].assert_start_raises_init_error(
             expected_msg='Error: Prune cannot be configured with a negative value.',
             extra_args=['-prune=-1', '-txindex=0', '-disablegovernance'],