test: follow the phrase-emphasis log's new wording

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/test_logs_do_not_quote_the_prompt.py

@@ -41,4 +41,4 @@ def test_the_sampler_reports_the_same_way():
     import samplers
     src = inspect.getsource(samplers)
     assert "strongest x{strongest:.2f}" in src
-    assert "token span(s) biased" in src
+    assert "learned span(s)" in src and "timed window(s)" in src