[dvsim] Fix remaining comments  from #5876

Signed-off-by: Srikrishna Iyer <sriyer@google.com>
diff --git a/util/dvsim/utils_test.py b/util/dvsim/utils_test.py
index d8267b7..f3a0179 100644
--- a/util/dvsim/utils_test.py
+++ b/util/dvsim/utils_test.py
@@ -64,6 +64,9 @@
     assert (subst_wildcards('{eval_cmd}echo foo {b}', {'b': 'bar'}) ==
             'foo bar')
 
+    assert (subst_wildcards('foo {eval_cmd}echo {b}', {'b': 'bar'}) ==
+            'foo bar')
+
     # Make sure that nested commands work
     assert (subst_wildcards('{eval_cmd} {eval_cmd} echo echo a', {}) == 'a')