Merge bitcoin#29805: test: Fix debug recommendation in argsman_tests

561a650 test: Fix debug recommendation in argsman_tests (Fabian Jahr)

Pull request description:

  There are recommendations in the `argsman_tests` comments on how to re-run and debug a test failure to see if it reflects an expected or unexpected change. The command tries to run a test in `util_tests` but this is in `argsman_tests` so the command doesn't work with just copy+paste. I didn't investigate further but I suspect that these tests were moved between files.

ACKs for top commit:
  fanquake:
    ACK 561a650

Tree-SHA512: b3bb94ba1635c9455149b455f2b30ee37a8067a6242339531ab54d428177a288da29a4a10702652305eb34aa7638f51dad35fa6b0e7b74617e445327b8c4c053

src/test/argsman_tests.cpp

@@ -904,7 +904,7 @@ BOOST_FIXTURE_TEST_CASE(util_ArgsMerge, ArgsMergeTestingSetup)
 
     // If check below fails, should manually dump the results with:
     //
-    //   ARGS_MERGE_TEST_OUT=results.txt ./test_bitcoin --run_test=util_tests/util_ArgsMerge
+    //   ARGS_MERGE_TEST_OUT=results.txt ./test_bitcoin --run_test=argsman_tests/util_ArgsMerge
     //
     // And verify diff against previous results to make sure the changes are expected.
     //
@@ -1007,7 +1007,7 @@ BOOST_FIXTURE_TEST_CASE(util_ChainMerge, ChainMergeTestingSetup)
 
     // If check below fails, should manually dump the results with:
     //
-    //   CHAIN_MERGE_TEST_OUT=results.txt ./test_bitcoin --run_test=util_tests/util_ChainMerge
+    //   CHAIN_MERGE_TEST_OUT=results.txt ./test_bitcoin --run_test=argsman_tests/util_ChainMerge
     //
     // And verify diff against previous results to make sure the changes are expected.
     //