an><span style='background-color:#4bfe4b'>)</span><span style='background-color:#76ff76'>)</span><span style='background-color:#b0ffb0'>)</span>, f&quot;{t} F -&gt; C -&gt; F failed!&quot;
    # Round-trip Celsius through Fahrenheit:
    assert <span style='background-color:#86ff86'>math</span><span style='background-color:#9fff9f'>.isclose</span><span style='background-color:#bbffbb'>(</span><span style='background-color:#bfffbf'>t</span><span style='background-color:#bbffbb'>, </span><span style='backgrou